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COVID-19 Situation Report 454 - NUS Module Blogs
For citation: Centre for Infectious Disease Epidemiology and Research-NUS.
                                                       COVID-19 Situation Report 454. 28 April 2021

                                                                          Apr              28

 COVID-19
 Situation Report 454

Centre for Infectious Disease Epidemiology and Research (CIDER)
For citation: Centre for Infectious Disease Epidemiology and Research-NUS.
                                                                                COVID-19 Situation Report 454. 28 April 2021

i.      Background
In December, China notified the World Health Organization (WHO) of several cases of human respiratory
illness, which appeared to be linked to an open seafood and livestock market in the city of Wuhan. The
infecting agent has since been identified as a novel coronavirus, previously known as 2019-nCoV and now
called SAR-CoV-2; The new name of the disease has also been termed COVID-19, as of 11th February 2020.
Although the virus is presumed zoonotic in origin, person-to-person spread is evident. Screening of
travellers, travel bans and quarantine measures are being implemented in many countries. Despite these
precautions, it is anticipated that more cases will be seen both inside China and internationally. The WHO
declared the outbreak of COVID-19 constitutes a Public Health Emergency of International Concern on 30
January. On 11 March, 2020, WHO declared the coronavirus outbreak a pandemic as the global death toll
rose above 4,600 and the number of confirmed cases topped 125,000. This report aims to update Global
Risk Assessment, Global Epidemiology, Quarantine Orders, Travel Ban/Advisory by countries, WHO’s and
CDC’s Guidance and Protocols and Scientific publication on a daily basis. New updates in the tables are
bolded.

1|Page                 Centre for infectious disease epidemiology and research
For citation: Centre for Infectious Disease Epidemiology and Research-NUS.
                                                                                           COVID-19 Situation Report 454. 28 April 2021

       ii.      Global Risk Assessment
       Table 1. Risk assessment of COVID-19 by WHO regions (Updated as of 28 Apr 2021, 11:00 SGT)
                                                                 Severity of             Availability of Treatment/               Overall
             Environmental Risk               Transmissibility
                                                                  Disease                      Vaccination#                        Risk
Global (n=198 countries)
High                                          Moderate           High            Limited

Globally, 189 (95.4%) countries (excluding    Based on CDC       Case            The number of countries that have
territories*) have reported the outbreak.     data, median R0    fatality rate   commenced mass vaccination in each
                                              is estimated to    is currently    region are as follows: Combined WPRO
Using an incidence >20 cases/100,000          be 5.8 (95% CI     at 2.11%        and SEARO (31 countries), EURO (52
people over the past 14-days as cut-off for   4.4–7.7), but      globally.       countries), EMRO (18 countries),
a surge in cases, the number of countries     the estimated      Most cases      Americas (33 countries), and Africa (39
reporting a surge in cases in each region     effective          present as      countries).&
are as follows: Combined WPRO and             reproduction       flu-like
SEARO (14 countries),                         number in 171      illness.        International clinical trials published on
EURO (49 countries),                          countries                          2 September confirm that cheap, widely
EMRO (15 countries), Americas (30             ranged from                        available steroid drugs can help
countries), and Africa (9 countries).         0.42 to 4.1.$                      seriously ill patients survive Covid-19.
                                                                                 The World Health Organization issued
Only 4 (2%) countries/territories have no                                        new treatment guidance, strongly
reported restrictions on inbound arrivals,                                       recommending steroids to treat
while 144 (78%) countries/territories have                                       severely and critically ill patients, but
partially reopened their borders – require                                       not to those with mild disease. [4]
arrivals to produce a negative COVID-19
test result and/or undergo self-quarantine                                       Researchers have found all regimens of
upon arrival. 51 (28%)                                                           anticoagulants to be far superior to no
countries/territories are totally closed to                                      anticoagulants in COVID-19 patients.
international arrivals. [1]                                                      More specifically, patients on both a              High
                                                                                 “therapeutic” or full dose and those on
On October 7, the Centers for Disease                                            a “prophylactic” or lower dose, showed
Control and Prevention (CDC) confirmed                                           about a 50% higher chance of survival
airborne transmission of SARS-CoV-2. [2]                                         and roughly a 30% lower chance of
                                                                                 intubation, than those not on
The U.S. CDC has revised its guidance on                                         anticoagulants. It was observed that
COVID-19 quarantine period from 14 days                                          therapeutic and prophylactic
to 7-10 days, based one's test results and                                       subcutaneous low-molecular weight
symptoms. Individuals without symptoms                                           heparin and therapeutic oral apixaban
only need quarantine for 10 days without                                         may lead to better results. [3]
testing; those tested negative can
quarantine for 7 days. [14]                                                      A new strain known as B.1.525
                                                                                 containing the same E484K mutation
The US Centers for Disease Control and                                           found in the Brazilian and South African
Prevention (CDC) on 10 Feb announced                                             variants has been detected in Britain
that fully vaccinated people did not need                                        [18].
to quarantine if they received their last
dose within three months and 14 days
after their last shot, the time it takes to
develop immunity. [16]

       2|Page                     Centre for infectious disease epidemiology and research
For citation: Centre for Infectious Disease Epidemiology and Research-NUS.
                                                                                          COVID-19 Situation Report 454. 28 April 2021

Western Pacific Region and South-East Asia Region (n=41 countries)
Moderate                                      Moderate          Moderate        High

33 (80.5%) countries have reported            As of Apr 26,     Case            31 countries have commenced
outbreaks; but only 14 (34.2%) countries      the estimated     fatality rate   vaccination as of 28 April 2021.
are reporting a surge in cases.               effective         is 1.29%.       Coverage was available for the
                                              reproduction                      following: i) at least 1 dose was at 70% for 1 country ii) full vaccination
or no case in the last 14 days.               ranged from                       was at
For citation: Centre for Infectious Disease Epidemiology and Research-NUS.
                                                                                          COVID-19 Situation Report 454. 28 April 2021

Highest incidence over the past 14 days                                         As of June 25, the Abu Dhabi Stem Cell
were reported from Bahrain, Kuwait,                                             Centre has treated more than 2,000
Oman, Palestine and Qatar, and highest                                          COVID-19 patients using UAECell19.
case numbers were reported from Iran,                                           1,200 have fully recovered. [6]
Iraq, Jordan, Pakistan and Tunisia.
                                                                                As of April, an Israeli firm is using
At least 5 countries have closed their                                          placenta pluristem cells to treat COVID-
borders, 16 countries have opened their                                         19 patients on a compassionate use
borders partially conditionally, and only 1                                     basis. [5]
country is allowing free travel.

Region of the Americas (n=35 countries)
High                                          Moderate          High            High

35 (100%) countries have reported with        As of Apr 26,     Case            33 countries have commenced
outbreak; 30 (85.7%) countries are            the estimated     fatality rate   vaccination as of 28 April 2021.
reporting a surge in cases.                   effective         is 2.43%.       Coverage was available for the
                                              reproduction                      following: i) at least 1 dose was at
For citation: Centre for Infectious Disease Epidemiology and Research-NUS.
                                                                                          COVID-19 Situation Report 454. 28 April 2021

                                                                                FDA has allowed emergency use of Eli
                                                                                Lilly & Co’s bamlanivimab for non-
                                                                                hospitalized patients at risk of serious
                                                                                illness due to age or other conditions.
                                                                                [10]

                                                                                FDA has issued emergency
                                                                                authorisation for convalescent plasma
                                                                                to treat COVID-19. [9]

                                                                                RLF-100 (aviptadil) by NeuroRx and
                                                                                Relief Therapeutics was approved for
                                                                                emergency use in COVID-19 patients
                                                                                who are too ill to participate in the trial.
                                                                                [8]

                                                                                As of October 22, remdesivir is the first
                                                                                and only FDA-approved COVID-19
                                                                                treatment in the U.S. [7].
African Region (n=47 countries)
Moderate                                     Moderate           High            High

47 (100%) countries have reported with       As of Apr 26,      Case            39 countries have commenced
outbreak; 9 (19.6%) countries are            the estimated      fatality rate   vaccination as of 28 April 2021.
reporting a surge in cases.                  effective          is 2.52%.       Coverage was available for the
                                             reproduction                       following: i) at least 1 dose was at
For citation: Centre for Infectious Disease Epidemiology and Research-NUS.
                                                                                                COVID-19 Situation Report 454. 28 April 2021

iii.      Global Epidemiology
Table 2. Summary of COVID-19 cases & fatalities globally (Updated as of 28 Apr 2021, 11:00 SGT)
                                                                         Case-
   No. of                     Total Cases                    Case-
                                                                        Fatality
 Countries/ Total Global       Outside           Total      Fatality
                                                                       Rate (%)           R0
 Territories      Cases        Mainland         Deaths     Rate (%)
                                                                       [outside
 with Cases                     China                      [overall]
                                                                        China]
                                                                                   5.8 (95% CI 4.4–
     220      149,328,858 149,238,236 3,148,781              2.11%       2.11%
                                                                                         7.7)^
^Based on early release as of 10th April, 2020: https://wwwnc.cdc.gov/eid/article/26/7/20-0282_article

Table 3. Comparison with other viruses
        Virus        Incubation Period (Days)                        Case Fatality Rate (%)                           R0
                           Median = 5.1$
    SARS-CoV-2                                                                  2.11                     5.8 (95% CI 4.4–7.7) ^
                        (2-14) or up to 24*
     SARS-CoV                   2-7                                              9.6                             2.0
For citation: Centre for Infectious Disease Epidemiology and Research-NUS.
                                                                                                COVID-19 Situation Report 454. 28 April 2021

Figure 2. Growth Factor excluding mainland China

Figure 3. Growth Factor of Novel Coronavirus Daily Deaths (Mainland China + Other Countries)

Growth Factor = every day’s cases/cases on previous day. A growth factor above 1 indicates an increase, whereas one between 0 and 1 is a sign
of decline, with the quantity eventually becoming zero. A growth factor below 1 (or above 1 but trending downward) is a positive sign, whereas
a growth factor constantly above 1 is the sign of exponential growth.
Source: https://www.worldometers.info/coronavirus/coronavirus-cases/

7|Page                         Centre for infectious disease epidemiology and research
For citation: Centre for Infectious Disease Epidemiology and Research-NUS.
                                                                           COVID-19 Situation Report 454. 28 April 2021

Case Breakdown by Countries
Live update of COVID-19 global cases can be found at
https://storymaps.arcgis.com/stories/a1746ada9bff48c09ef76e5a788b5910

Table 4. Breakdown of COVID-19 confirmed cases and deaths (Updated as of 28 Apr 2021, 11:00 SGT)
      Country                Total Cases Change Total Deaths Change Total Recovered Region

1    USA                    32,927,091    +52046       587,384           +773         25,521,913             Americas
2    India                  17,988,637    +352330      201,165           +3271        14,807,704             SEARO
3    Brazil                 14,446,541    +76085       395,324           +3120        12,992,442             Americas
4    France                 5,534,313     +30317       103,603           +347         4,441,986              EURO
5    Russia                 4,779,425     +8053        108,980           +392         4,402,678              EURO
6    Turkey                 4,710,582     +43301       39,057            +346         4,167,263              EURO
7    UK                     4,409,631     +2685        127,451           +17          4,202,311              EURO
8    Italy                  3,981,512     +10398       119,912           +373         3,413,451              EURO
9    Spain                  3,496,134     +7665        77,855            +117         3,186,967              EURO
10   Germany                3,326,778     +19009       82,698            +354         2,931,400              EURO
11   Argentina              2,905,172     +25495       62,599            +512         2,563,223              Americas
12   Colombia               2,804,881     +17578       72,235            +436         2,616,821              Americas
13   Poland                 2,768,034     +5711        65,897            +460         2,467,036              EURO
14   Iran                   2,438,193     +20963       70,532            +462         1,907,190              EMRO
15   Mexico                 2,333,126     +3592        215,547           +434         1,856,543              Americas
16   Ukraine                2,038,248     +7915        42,950            +432         1,596,829              EURO
17   Peru                   1,775,062     +6876        60,416            +403         1,688,091              Americas
18   Indonesia              1,651,794     +4656        44,939            +169         1,506,599              SEARO
19   Czechia                1,622,777     +2571        29,075            +73          1,541,963              EURO
20   South Africa           1,577,200     +880         54,237            +51          1,502,986              Africa
21   Netherlands            1,472,674     +5337        17,093            +31          1,235,344              EURO
22   Canada                 1,194,989     +7071        24,065            +41          1,086,611              Americas
23   Chile                  1,179,772     +4158        26,020            +45          1,113,463              Americas
24   Romania                1,049,539     +2019        27,683            +172         979,445                EURO
25   Iraq                   1,045,010     +7152        15,348            +45          920,523                EMRO
26   Philippines            1,013,618     +7190        16,916            +63          925,027                WPRO
27   Belgium                976,088       0            24,065            0            841,998                EURO
28   Sweden                 953,254       +14911       13,968            +45          779,472                EURO
29   Israel                 838,217       +110         6,359             +6           830,205                EURO
30   Portugal               834,991       +353         16,970            +5           794,205                EURO
31   Pakistan               810,231       +5292        17,530            +201         704,494                EMRO
32   Hungary                772,707       +1253        26,984            +183         491,620                EURO
33   Bangladesh             751,659       +3031        11,228            +78          666,927                SEARO
34   Jordan                 706,355       +1815        8,707             +47          675,212                EMRO
35   Serbia                 683,799       +2145        6,286             +29          626,756                EURO

8|Page               Centre for infectious disease epidemiology and research
For citation: Centre for Infectious Disease Epidemiology and Research-NUS.
                                                                        COVID-19 Situation Report 454. 28 April 2021

36   Switzerland              653,957   +2135       10,587            +4           581,714                EURO
37   Austria                  612,170   +1625       10,126            +28          577,977                EURO
38   Japan                    571,040   +4177       10,004            +32          508,388                WPRO
39   Lebanon                  522,763   +1182       7,197             +26          453,865                EMRO
40   UAE                      514,591   +2094       1,578             +5           495,589                EMRO
41   Morocco                  509,972   +507        9,005             +6           496,031                EMRO
42   Saudi Arabia             414,219   +1045       6,922             +9           397,587                EMRO
43   Bulgaria                 401,109   +1850       16,182            +81          332,418                EURO
44   Malaysia                 398,451   +2733       1,462             +13          371,575                WPRO
45   Slovakia                 380,498   +488        11,572            +41          360,466                EURO
46   Ecuador                  375,329   +554        18,389            +89          318,598                Americas
47   Panama                   363,533   +368        6,216             +4           353,503                Americas
48   Belarus                  354,669   +823        2,512             +10          344,950                EURO
49   Greece                   337,723   +3287       10,179            +92          291,153                EURO
50   Croatia                  324,833   +1797       6,957             +52          304,546                EURO
51   Azerbaijan               315,119   +1307       4,429             +27          282,786                EURO
52   Kazakhstan               311,400   0           3,599             0            265,940                EURO
53   Nepal                    307,925   +4364       3,194             +18          278,506                SEARO
54   Georgia                  305,850   +1578       4,060             +17          287,938                EURO
55   Tunisia                  303,584   +1957       10,444            +92          253,058                EMRO
56   Bolivia                  298,778   0           12,861            0            246,673                Americas
57   Palestine                293,466   +1414       3,201             +17          267,346                EMRO
58   Paraguay                 271,814   +2461       6,094             +92          223,606                Americas
59   Kuwait                   269,681   +1446       1,535             +8           252,888                EMRO
60   Dominican Republic       265,481   +78         3,462             +3           222,466                Americas
61   Ethiopia                 254,044   +924        3,605             +35          195,547                Africa
62   Moldova                  249,714   +329        5,762             +17          238,423                EURO
63   Denmark                  248,950   +624        2,479             +2           236,925                EURO
64   Ireland                  247,489   +420        4,884             +10          229,657                EURO
65   Costa Rica               243,167   +1927       3,186             +18          201,784                Americas
66   Lithuania                242,926   +1054       3,877             +20          219,678                EURO
67   Slovenia                 238,023   +804        4,221             +7           223,686                EURO
68   Egypt                    224,517   +1003       13,168            +61          168,665                EMRO
69   Guatemala                223,025   +1086       7,453             +25          199,005                Americas
70   Armenia                  214,064   +595        4,058             +18          195,701                EURO
71   Honduras                 207,320   0           5,193             0            77,814                 Americas
72   Qatar                    203,599   +695        441               +4           184,712                EMRO
73   Bosnia and Herzegovina   196,732   +761        8,418             +68          157,095                EURO
74   Venezuela                193,721   +1223       2,082             +17          176,058                Americas
75   Oman                     191,398   +1128       1,992             +9           170,929                EMRO
76   Uruguay                  190,096   +2747       2,452             +61          160,632                Americas
77   Libya                    176,254   +501        3,010             +5           161,676                EMRO

9|Page              Centre for infectious disease epidemiology and research
For citation: Centre for Infectious Disease Epidemiology and Research-NUS.
                                                                     COVID-19 Situation Report 454. 28 April 2021

78    Bahrain            173,548    +972         626               +1           162,537                EMRO
79    Nigeria            164,912    +156         2,063             +1           155,012                Africa
80    Kenya              157,492    +511         2,665             +22          106,836                Africa
81    North Macedonia    151,122    +450         4,742             +28          130,910                EURO
82    Myanmar            142,740    +18          3,207             0            131,945                SEARO
83    Albania            130,736    +130         2,383             +4           107,163                EURO
84    Algeria            121,344    +232         3,225             +8           84,598                 Africa
85    Estonia            120,836    +458         1,148             +3           108,968                EURO
86    S. Korea           120,673    +775         1,821             +1           110,248                WPRO
87    Latvia             116,132    +596         2,110             +4           105,828                EURO
88    Norway             111,686    +524         736               0            88,952                 EURO
89    Cuba               103,524    +1083        604               +7           97,462                 Americas
90    Sri Lanka          103,487    +1111        647               0            94,856                 SEARO
91    Montenegro         96,930     +151         1,478             +5           92,975                 EURO
92    Kyrgyzstan         94,277     +247         1,589             +5           88,415                 EURO
93    Ghana              92,464     +211         779               +2           90,103                 Africa
94    Zambia             91,418     +40          1,249             +1           89,717                 Africa
95    China              90,622     +12          4,636             0            85,669                 WPRO
96    Uzbekistan         89,630     +275         646               +1           86,180                 EURO
97    Finland            86,161     +224         908               +2           46,000                 EURO
98    Mozambique         69,762     +47          814               +5           64,448                 Africa
99    El Salvador        68,922     +454         2,111             +5           64,667                 Americas
100   Luxembourg         66,594     +220         791               0            62,989                 EURO
101   Cameroon           65,998     0            991               0            57,821                 Africa
102   Cyprus             63,720     +760         303               +2           39,061                 EURO
103   Singapore          61,063     +12          30                0            60,704                 WPRO
104   Thailand           59,687     0            163               0            33,551                 SEARO
105   Afghanistan        59,370     +145         2,611             +13          52,794                 EMRO
106   Namibia            48,011     +70          634               +6           45,740                 Africa
107   Botswana           46,600     +745         702               +11          44,740                 Africa
108   Ivory Coast        45,885     +22          285               +2           45,451                 Africa
109   Jamaica            45,212     +67          767               +6           20,729                 Americas
110   Uganda             41,737     +22          341               0            40,898                 Africa
111   Senegal            40,193     +27          1,106             +2           38,953                 Africa
112   Zimbabwe           38,164     +62          1,565             +5           35,480                 Africa
113   Madagascar         36,190     +145         614               +9           29,370                 Africa
114   Malawi             34,031     +10          1,147             0            31,953                 Africa
115   Sudan              33,104     +242         2,349             +9           26,795                 EMRO
116   Mongolia           32,437     0            88                0            17,543                 WPRO
117   Malta              30,234     +45          413               0            29,421                 EURO
118   Australia          29,745     +28          910               0            28,558                 WPRO
119   DRC                29,701     +90          760               +4           26,156                 Africa

10 | P a g e        Centre for infectious disease epidemiology and research
For citation: Centre for Infectious Disease Epidemiology and Research-NUS.
                                                                       COVID-19 Situation Report 454. 28 April 2021

120   Maldives              28,588    +386         71                0            24,499                 SEARO
121   Angola                25,942    +232         587               +4           23,341                 Africa
122   Rwanda                24,814    +137         331               +1           23,089                 Africa
123   Cabo Verde            22,772    +186         211               +3           19,715                 Africa
124   Gabon                 22,568    0            138               0            19,173                 Africa
125   Syria                 22,389    +124         1,559             +11          16,283                 EMRO
126   Guinea                22,046    +61          141               0            19,466                 Africa
127   Réunion               20,381    +1038        148               +7           18,659                 Non
128   Mayotte               19,849    0            169               0            2,964                  Non
129   French Guiana         19,099    +95          100               0            9,995                  Non
130   French Polynesia      18,744    +5           141               0            4,842                  Non
131   Eswatini              18,448    +5           671               0            17,741                 Africa
132   Mauritania            18,314    +32          455               0            17,620                 Africa
133   Somalia               13,915    +103         713               +11          5,847                  EMRO
134   Mali                  13,722    +64          476               +2           8,313                  Africa
135   Guadeloupe            13,669    0            185               0            2,242                  Non
136   Tajikistan            13,308    0            90                0            13,218                 EURO
137   Burkina Faso          13,263    0            156               0            12,937                 Africa
138   Andorra               13,121    +38          124               0            12,561                 EURO
139   Haiti                 13,017    +18          254               +1           12,143                 Americas
140   Togo                  12,884    +57          122               0            10,927                 Africa
141   Guyana                12,826    +72          291               +4           10,944                 Americas
142   Belize                12,631    +7           322               0            12,193                 Americas
143   Curaçao               12,146    +17          107               +2           11,339                 Non
144   Hong Kong             11,749    +8           209               0            11,379                 WPRO
145   Martinique            11,253    +642         75                +7           98                     Non
146   Cambodia              11,063    +508         82                +3           3,704                  WPRO
147   Djibouti              10,931    +46          142               +4           10,510                 EMRO
148   Papua New Guinea      10,835    0            105               0            8,561                  WPRO
149   Lesotho               10,728    0            316               0            6,267                  Africa
150   Congo                 10,678    0            144               0            8,208                  Africa
151   Aruba                 10,570    +15          98                0            10,245                 Non
152   South Sudan           10,553    +15          114               0            10,312                 Africa
153   Bahamas               10,220    0            198               0            9,326                  Americas
154   Suriname              10,157    +76          201               0            9,193                  Americas
155   Trinidad and Tobago   9,947     +151         161               +2           8,281                  Americas
156   Benin                 7,720     0            97                0            7,510                  Africa
157   Equatorial Guinea     7,559     0            107               0            7,097                  Africa
158   Nicaragua             6,898     +63          182               +1           4,225                  Americas
159   Iceland               6,447     +18          29                0            6,240                  EURO
160   CAR                   6,359     +135         87                +2           5,112                  Africa
161   Yemen                 6,220     +37          1,207             +2           2,674                  EMRO

11 | P a g e          Centre for infectious disease epidemiology and research
For citation: Centre for Infectious Disease Epidemiology and Research-NUS.
                                                                       COVID-19 Situation Report 454. 28 April 2021

162   Gambia                   5,882   +25         174               +1           5,309                  Africa
163   Seychelles               5,354   0           26                0            4,675                  Africa
164   Niger                    5,220   +16         191               0            4,843                  Africa
165   San Marino               5,058   +3          90                0            4,880                  EURO
166   Chad                     4,779   +7          170               +1           4,406                  Africa
167   Saint Lucia              4,508   +6          74                +1           4,344                  Americas
168   Gibraltar                4,283   0           94                0            4,183                  Non
169   Channel Islands          4,111   0           86                0            3,956                  Non
170   Sierra Leone             4,046   0           79                0            3,045                  Africa
171   Burundi                  3,884   +10         6                 0            773                    Africa
172   Comoros                  3,829   0           146               0            3,650                  Africa
173   Barbados                 3,828   +3          44                0            3,746                  Americas
174   Guinea-Bissau            3,731   +5          67                0            3,267                  Africa
175   Eritrea                  3,640   0           10                0            3,455                  Africa
176   Liechtenstein            2,903   +18         57                0            2,766                  Non
177   Vietnam                  2,857   +5          35                0            2,516                  WPRO
178   New Zealand              2,609   0           26                0            2,547                  WPRO
179   Monaco                   2,442   +3          32                0            2,338                  EURO
180   Turks and Caicos         2,379   +3          17                0            2,328                  Non
181   Bermuda                  2,362   +5          24                0            1,737                  Non
182   Sao Tome and Principe    2,299   0           35                0            2,239                  Africa
183   Sint Maarten             2,220   0           27                0            2,181                  Non
184   Liberia                  2,098   0           85                0            1,942                  Africa
185   Timor-Leste              2,048   +99         3                 0            972                    SEARO
186   St. Vincent Grenadines   1,844   +5          11                +1           1,711                  Americas
187   Saint Martin             1,720   0           12                0            1,399                  Non
188   Isle of Man              1,587   0           29                0            1,545                  Non
189   Caribbean Netherlands    1,556   +2          15                0            1,465                  Non
190   Antigua and Barbuda      1,232   +4          32                0            1,014                  Americas
191   Mauritius                1,206   0           17                0            1,055                  Africa
192   Taiwan                   1,110   +6          12                0            1,050                  WPRO
193   Bhutan                   1,053   +27         1                 0            951                    SEARO
194   St. Barth                958     0           1                 0            462                    Non
195   Diamond Princess         712     0           13                0            699                    NA
196   Faeroe Islands           663     0           1                 0            661                    Non
197   Cayman Islands           541     0           2                 0            521                    Non
198   Laos                     511     +75         0                 0            49                     WPRO
199   Tanzania                 509     0           21                0            183                    Africa
200   Wallis and Futuna        443     +1          5                 0            44                     Non
201   Brunei                   223     0           3                 0            212                    WPRO
202   British Virgin Islands   194     0           1                 0            183                    Non
203   Dominica                 173     0           0                 0            171                    Americas

12 | P a g e          Centre for infectious disease epidemiology and research
For citation: Centre for Infectious Disease Epidemiology and Research-NUS.
                                                                               COVID-19 Situation Report 454. 28 April 2021

204   Grenada                  159            0            1                 0            155                    Americas
205   New Caledonia            124            0            0                 0            58                     Non
206   Fiji                     109            +6           2                 0            65                     WPRO
207   Anguilla                 84             +4           0                 0            29                     Non
208   Falkland Islands         63             0            0                 0            62                     Non
209   Macao                    49             0            0                 0            49                     WPRO
210   Saint Kitts and Nevis    44             0            0                 0            44                     Americas
211   Greenland                31             0            0                 0            31                     Non
212   Vatican City             27             0            0                 0            15                     Non
213   Saint Pierre Miquelon    25             0            0                 0            24                     Non
214   Montserrat               20             0            1                 0            19                     Non
215   Solomon Islands          20             0            0                 0            19                     WPRO
216   Western Sahara           10             0            1                 0            8                      Non
217   MS Zaandam               9              0            2                 0            7                      NA
218   Vanuatu                  4              0            1                 0            3                      WPRO
219   Marshall Islands         4              0            0                 0            4                      WPRO
220   Samoa                    3              0            0                 0            2                      WPRO
221   Saint Helena             2              0            0                 0            2                      Non
222   Micronesia               1              0            0                 0            1                      WPRO
      Total                    149,328,858    +831172      3,148,781         14,921       127,465,511

Figure 4. Areas with reported confirmed cases of COVID-19 (19 April – 25 April 2021)

Source: https://www.who.int/emergencies/diseases/novel-coronavirus-2019/situation-reports

13 | P a g e           Centre for infectious disease epidemiology and research
For citation: Centre for Infectious Disease Epidemiology and Research-NUS.
                                                                             COVID-19 Situation Report 454. 28 April 2021

Table 5. COVID-19 cases and deaths reported by provinces in China (Updated as of 28 Apr 2021, 11:00
SGT)
     Area           Existing     Change from        Total       Deaths Change from Recovered
                     Active      previous day     Diagnosed               previous day
                     Cases      (Active cases)      Cases                   (Deaths)
Shanghai              62             -1             1,972              7               0               1,903
Yunnan                59              0              342               2               0                281
Guangdong             44             +2             2,334              8               0               2,282
Fujian                26             -1              590               1               0                563
Sichuan               24             +1              978               3               0                951
Shaanxi               18             +1              590               3               0                569
Hainan                16               0          187                 6                0               165
Zhejiang              11               0         1,332                1                0              1,320
Beijing                9               0         1,057                9                0              1,039
Jiangsu                9               0          718                 0                0               709
Tianjin                9               0          385                 3                0               373
Shanxi                 6               0          249                 0                0               243
Hubei                  5               0        68,157              4,512              0              63,640
Shandong               5               0          876                 7                0               864
Chongqing              5             +1           596                 6                0               585
Henan                  4              -1         1,312               22                0              1,286
Hunan                  3               0         1,044                4                0              1,037
Inner Mongolia         3               0          380                 1                0               376
Guangxi                3               0          270                 2                0               265
Gansu                  1               0          193                 2                0               190
Heilongjiang           0               0         1,610               13                0              1,597
Hebei                  0               0         1,317                7                0              1,310
Anhui                  0               0          994                 6                0               988
Xinjiang               0               0          980                 3                0               977
Jiangxi                0               0          937                 1                0               936
Jilin                  0               0          573                 3                0               570
Liaoning               0               0          408                 2                0               406
Guizhou                0               0          147                 2                0               145
Ningxia                0               0          75                  0                0                75
Qinghai                0               0          18                  0                0                18
Tibet                  0               0           1                  0                0                1
Source: https://ncov.dxy.cn/ncovh5/view/pneumonia

14 | P a g e          Centre for infectious disease epidemiology and research
For citation: Centre for Infectious Disease Epidemiology and Research-NUS.
                                                                                    COVID-19 Situation Report 454. 28 April 2021

iv.       Travel Bans/Advisories & Quarantine Orders
      [1] Australia – As of 28 April, all flights from India will be suspended until at least May 15.
      [2] Belgium – All passenger traveling by air, train, boat, and bus, including transit traffic, from India,
          Brazil and South Africa to Belgium will be banned. Belgian nationals and those who have their
          main residence in Belgium can return from these countries.
      [3] Czech Republic – As of 27 April, all travels to India has been banned while tightening the
          measures for those that are arriving from India. Only Czechs citizens and residents will be
          allowed to return and will have to undergo a PCR test on the day of arrival, in 24 hours upon
          returning and between the tenth and the fourteenth day after arrival, while staying in
          quarantine for the entire period.
      [4] Malawi – With immediate effect, all travels to and from Bangladesh, Brazil, India and Pakistan
          has been banned. Any essential travel shall be required to undergo mandatory institutional
          quarantine, negative PCR-based COVID-19 test result or certificate conducted no more than 72
          hours before arrival.
      [5] Pakistan – From May 8 to May 16, a blanket ban on tourism and inter-provincial transport and
          closure of all tourist resorts, hotels, restaurants, shopping centers, parks, beaches, and other
          public places will be in effect.
      [6] Philippines - From April 29 to May 14, entry of travelers from India as well as those with recent
          travel history will be banned.
      [7] Qatar – As of 28 April, a compulsory hotel quarantine has been imposed on all arrivals including
          transit and vaccinated passengers from India, Nepal, Bangladesh, Pakistan, Sri Lanka and the
          Philippines. Arrivals must undergo 10-14 days quarantine based on the facility. Passengers are
          also required to take a mandatory Covid-19 PCR test done 48 hours before departure and a
          repeat test within a day of arriving.

v.        Lockdowns
      [1] Cambodia – Lockdown in Phnom Penh and Takmao town has been extended until May 5. From
          April 29, lockdown areas will be designated as Red Zone, Dark Yellow Zone, and Yellow Zone
          depending on the severity of the outbreak and restrictions will be set accordingly.
      [2] India (Chhattisgarh) – Lockdown in 14 districts: Raipur, Balod, Mahasamund, Durg,
          Rajnandgaon, Dhamtari, Korba, Bemetra, Jashpur, Surajpur, Surguja, Balrampur, Kanker and
          Kondagaon has been extended until May 5.
      [3] India (Nagaland) – As of 30 April, two-week lockdown will be implemented in the state with
          consolidated guidelines. While educational institutions including vocational and training
          institutes, hostels, will remain shut, restaurants and shopping malls can remain open with strict
          adherence to COVID-19 protocols and no restrictions will be placed on essential commodities.

15 | P a g e              Centre for infectious disease epidemiology and research
For citation: Centre for Infectious Disease Epidemiology and Research-NUS.
                                                                                COVID-19 Situation Report 454. 28 April 2021

vi.       Military Surveillance
Petawawa military base in Ontario hit with COVID outbreak [1]
As of 27 April, a small outbreak of COVID-19 was confirmed at Garrison Petawawa and contact tracing
and isolation of affected personnel has occurred. As of April 19, there have been 1,525 confirmed cases
of coronavirus in the Canadian military, 99 of them active and the rest have been resolved.

South Korea - COVID-19 cases in USFK [2]
As of 27 April, a soldier at U.S. Army Garrison Humphreys was confirmed to have contracted COVID-19.
The American service member was stationed at a U.S. military base in Pyeongtaek and is currently in
isolation at a designated facility. The latest case raised the total number of infections reported among
the USFK-affiliated population to 840.

vii.      WHO Guidance & Other Protocols
No new update was published by the WHO on 27 April 2021.

viii. CDC Guidance & Protocols
US CDC

The following update was published by the US CDC on 27 April 2021:

         COVID-19 Vaccination Program Provider Enrollment: Guidance for Providers
          Available at: https://www.cdc.gov/vaccines/covid-19/reporting/requirements/support-for-
          providers.html

EU CDC

No new update was published by the EU CDC on 27 April 2021.

16 | P a g e           Centre for infectious disease epidemiology and research
For citation: Centre for Infectious Disease Epidemiology and Research-NUS.
                                                                                  COVID-19 Situation Report 454. 28 April 2021

ix.       Vaccines/Therapeutics Development
Noteworthy reports are included to inform main developments of COVID-19 pharmaceutics. Past updates
are available from situation report 211 onwards. A global map and registry of trials is also visualised &
accessible at: https://www.covid-nma.com/dataviz/ and trial results are available at: https://covid-
nma.com/living_data/index.php. A living systematic review of vaccine trials is also accessable at
https://covid-nma.com/vaccines/ or https://covid-nma.com/ .

Vaccines

      [1] China - A clinical study of the Covid-19 inactivated vaccine combined with Zadaxin (thymalfasin)
          has begun in China by the Chinese company SciClone Pharmaceuticals.
      [2] UK - The National Institute for Health Research (NIHR)-supported Valneva Phase 2/3 study has
          been initiated for healthy adults who have not been previously vaccinated for COVID-19. All
          participants will receive two active vaccine doses, administered in a four-week interval; above
          30 years will receive either the Valneva vaccine, or the approved Oxford/AstraZeneca vaccine
          and those between 18 – 29 years will only receive the Valneva vaccine.

Therapeutics

      [3] Africa - The ANTICOV study includes a consortium of 26 African and global research and
          development organizations and will take place in 13 African countries. The trial will examine the
          combination of antiparasitic nitazoxanide and inhaled corticosteroid ciclesonide.
      [4] USA - A combination of remdesivir and repurposed drugs for hepatitis C virus (HCV): simeprevir,
          vaniprevir, paritaprevir, and grazoprevir has shown 10 times more effectiveness at inhibiting
          SARS-CoV-2.

Vaccine Approval Status

Table 6: Number of approving countries per vaccine as of 27 April 2021
          Developer                          Vaccine                   Number of countries approving
    Anhui Zhifei Longcom                   RBD-Dimer                                2
        Bharat Biotech                       Covaxin                                9
           CanSino                          Ad5-nCoV                                5
      Chumakov Center                        Kovivac                                1
              FBRI                        EpiVacCorona                              2
          Gamaleya                          Sputnik V                               63
     Johnson & Johnson                    Ad26.COV2.S                               41
           Moderna                         mRNA-1273                                46
     Oxford/AstraZeneca                     AZD1222                                 92
       BioNTech/Pfizer                      BNT162b2                                83
   Serum Institute of India                 Covishield                              33
          Sinopharm                        BBIBP-CorV                               35
          Sinopharm                        Inactivated                              2
            Sinovac                        CoronaVac                                22
Source: https://covid19.trackvaccines.org/vaccines/

17 | P a g e             Centre for infectious disease epidemiology and research
For citation: Centre for Infectious Disease Epidemiology and Research-NUS.
                                                                              COVID-19 Situation Report 454. 28 April 2021

Adverse Reactions & Effects

The following table documents adverse reactions reported from approved vaccines and therapeutics.
New updates are bolded.

Table 7: Compilation of reports & guidance on adverse reactions
 Vaccine             Report/Guidance                                                      Reference
                     [Canada; Report] One person in Manitoba reportedly had an
                     adverse reaction after receiving the first dose on December 23.         [1]
                     There were 490 more individuals vaccinated.
                     [United Kingdom; Report] Two British healthcare workers suffered
                                                                                             [2]
                     anaphylactic shock after receiving the vaccine.
                     [United States; Report] A healthcare worker in New York City
                     suffered anaphylaxis after receiving Pfizer BioNTech’s vaccine. The
                                                                                             [3]
                     worker is currently in a stable condition. 30,000 people have been
                     vaccinated so far.
                     [United States; Report] Two healthcare workers in northern Idaho
                     and the Treasure Valley, experienced severe allergic reactions
                                                                                             [4]
                     after receiving the vaccine. As of the time of reporting, one has
                     fully recovered while the other is expected to be discharged soon.
                     [United States; Report] There have been two cases of severe
                     allergic reaction in Alaska after receiving the COVID-19 vaccine.
                     Symptoms of the latest case include tongue swelling, hoarse voice       [5]
                     and difficulty breathing, which kicked in about 10 mins after
                     receving the vaccine.
                     [United States; Report] An individual at Decatur Morgan hospital,
                     Alabama, experienced severe allergic reaction several minutes
                                                                                             [6]
                     after getting the vaccine. The patient is currently in a stable
                     condition.
 Pfizer BioNTech
                     [United States; Report] Two healthcare workers from Essentia
                     Health, Minnesota had non-severe allergic reactions to the
                                                                                             [7]
                     vaccine. About 2,500 doses of the vaccines have been
                     administered to frontline workers at Essentia Health.
                     [United States; Report] According to Pfizer’s data submitted to the
                     FDA, the most common side effects were swelling and redness at
                     the vaccine injection site. Other noted common side effects in the
                                                                                             [8]
                     trial included fatigue, headache and muscle pain, which had a
                     greater chance of occurring after the second dose than the first
                     dose.
                     [United States; Guidance] The Centers for Disease Control and
                     Prevention (CDC) has issued new guidance on 21 December
                     regarding allergies and coronavirus vaccines after reports of severe
                                                                                             [9] s
                     allergic reactions to the jab. In the new guidance, the CDC
                     recommends that those who have a severe reaction to the first
                     shot of the vaccine should not receive the second jab.
                     [United States; Guidance] Health experts have said that the side
                     effects of COVID-19 vaccines by Pfizer BioNTech (and Moderna)
                     are short-term and manageable. The American College of Allergy,
                                                                                             [10]
                     Asthma & Immunology recently released a guideline on the risk of
                     allergic reactions to Pfizer BioNTech’s vaccine. The guideline is
                     available at https://acaai.org/news/american-college-allergy-

18 | P a g e          Centre for infectious disease epidemiology and research
For citation: Centre for Infectious Disease Epidemiology and Research-NUS.
                                                                          COVID-19 Situation Report 454. 28 April 2021

               asthma-and-immunology-updates-guidance-risk-allergic-reactions-
               mrna.
               [Canada; Report] Of 11,930 doses of Pfizer BioNTech’s vaccine
               administered in British Columbia so far there have been 2 cases of                   [11]
               allergic reaction.
               [Israel; Report] On December 28, a 46-year-old man in Jerusalem
               suffered severe anaphylactic shock one hour after receiving a
               COVID-19 vaccination. He is the first in Israel to have such a
               reaction, and is reportedly allergic to penicillin. His condition has
               since stabilized.
                                                                                                    [12]
               Separately, a 75-year old man died of heart failure at home some
               hours after receiving Pfizer BioNTech’s vaccine. The man was
               reported to have heart disease and cancer, and had suffered a
               number of previous heart attacks. While investigations are still
               ongoing, preliminary findings indicated that the death did not
               appear to be connected to the shot.
               [Finland; Report] On January 2, the first adverse reaction against
                                                                                                    [13]
               the vaccine was reported. No further details were released.
               [Mexico; Report] A 32-year-old doctor in Mexico has been
               admitted to intensive care unit with seizures, breathing difficulties
               and possible encephalomyelitis. While the cause of the adverse
               reaction is still under investigation, preliminary diagnosis indicates
               encephalomyelitis. The patient condition has been stablized and is
               receiving treatment to reduce inflammation.
                                                                                                    [14]
                                                                                                    [15]
               [Update] The doctor was allergic to sulfa drugs and has a family
               history of allergies. After developing allergic reaction, medication
               was administered to recover from the symptoms. However, she
               had subsequently suffered from convulsion. Diagnosis at that time
               was allergic reaction to the vaccine but the cause for convulsion
               and reduction of muscle strength is still being studied.
               [Bulgaria; Report] As of January 4, Bulgaria’s Medicines Agency
               had received four reports of adverse reactions. One case of
               dizziness after administration, two cases of local pain at the                       [16]
               vaccinated site, and one case of a slight temperature increase.
               These side effects had passed off in less than a day.
               [Portugal; Report] A portugese health worker had suffered a
               sudden death 2 days after being vaccinated on 30 Dec. She did not
               suffer from any adverse side-effect after vaccinated and did not
               has any health problem. An autopsy is expected to be conducted
               soon.                                                                                [17]
                                                                                                    [18]
               [Update] In a 5 January 2020 press release, the Portuguese
               Ministry of Justice informed that preliminary data from the
               autopsy showed “no evidence of a causal relationship between the
               death and the vaccine that was received.”
               [Mexico; Report] By January 5, more than 44,000 people have                          [19]
               received the first shot. As of January 4, about 110 people had                       [20]
               reported allergic reaction to the vaccine but 80% were mild and                      [21]

19 | P a g e    Centre for infectious disease epidemiology and research
For citation: Centre for Infectious Disease Epidemiology and Research-NUS.
                                                                         COVID-19 Situation Report 454. 28 April 2021

               only 5 people require hospitalization. Only one person was
               severely affected and remain in hospital.

               [Update] As of 16 January 2021, 753 adverse events (729 mild and
               24 serious) allegedly caused by vaccination and immunization
               were reported since 24 December 2020. The 24 serious events
               were reported from Coahuila (7 reports), Mexico City (4 cases),
               Chihuahua, State of Mexico, Guanajuato, Oaxaca and Yucatan (2
               reports each) and Baja California, Hidalgo and Jalisco (1 report
               each). Of the 24 serious events reports, 6 remain hospitalized
               while the remaining have been discharged.

               [Update] As of 9 Feb, 6,260 negative reactions have been reported
               nationwide with 36 serious reaction (0.9%). Yucatan has reported
               3 serious case of adverse reaction and most of them have
               discharged. The entities with the most negative reaction cases are
               Mexico City (6 cases) and Coahuila and State of Mexico (4 each).
               [United States; Publication] Centre of Disease Control and
               Prevention (CDC) has reviewed on the allergric reaction to the first
               dose of vaccine during 14 to 23 December. Among the 1,893,360
               first doses administered, 4,393 (0.2%) adverse events were
               reported. 21 cases of anaphylaxis (11.1 cases per million doses)
               were detected and 17 of them had history of allergies or allergy
               reaction. Of the 21 cases, 4 of them were hospitalized including 3
               in intensive care and 20 of them had discharged or recovered by
               23 December. There were no death reported.
                                                                                                   [22]
               [Update] The total number of cases of anaphylaxis has been                          [23]
               updated to 29 as on 6 January.                                                      [24]
                                                                                                   [25]
               [Update] CDC has roughly estimated that one in a hundred
               thousand people who received the Pfizer vaccine had severe
               allergic reactions. An average rate of 11.1 anaphylaxis cases per
               one million doses administered was estimated.

               [Update] FDA and CDC have a total of 1,170 death between Dec.
               14, 2020, and Feb. 7, 2021, among individuals who received Pfizer
               or Moderna Covid vaccine, accounting for 0.003% of vaccinated
               people.
               [United States; Report] A Florida doctor had died several weeks
               after receiving the vaccine on 18 Dec. He had suffered from
               hemorrhagic stroke due to a lack of platelets. It is unclear if his
               death was related to the vaccine while his death is being
               investigated. It was reported that he had dots on the skin
                                                                                                   [26]
               indicating internal bleeding 3 days after the injection. Pfizer and
                                                                                                   [27]
               BioNTech had not received any prior indication of possible
               connection to thrombocytopenia.

               [Update] As of 12 Jan, no evidence was obtained to suggest a
               connection between the vaccine and the death.

20 | P a g e    Centre for infectious disease epidemiology and research
For citation: Centre for Infectious Disease Epidemiology and Research-NUS.
                                                                         COVID-19 Situation Report 454. 28 April 2021

               [Canada; Report] Nine reports of adverse medical reactions which
               include a total of 65 symptoms, eight of which were considered
               severe, have been reported as of Jan. 1 but none were considered
               to be unexpected side effects.

               [Update] Fifteen new reports of adverse medical reactions, five of
               which were considered severe, have been reported as between
               January 1 and January 8. As of January 8, 24 reports of adverse
               effects were reported, consisting of 10 serious and 14-nonserious
               reports. All reports were considered to be expected side effects.
                                                                                                   [28]
               [Update] Sixty-six new reports of adverse medical reactions, 17 of
                                                                                                   [29]
               which were considered severe, have been reported as between
                                                                                                   [30]
               January 9 and January 15. As of January 15, 90 reports of adverse
                                                                                                   [31]
               effects were reported, consisting of 27 serious and 63-nonserious
               reports. Most frequently reported adverse events were
               vaccination site reactions, paraesthesia, pruritis, urticaria,
               headache, hypoaesthesia, nausea and anaphylaxis.

               [Update] As of 5 Feb, a total of 371 adverse effects were reported
               which include 74 serious AEFI and 297 non-serious AEFI.

               [Update] As of 26 March 2021, a total of 1,659 adverse effects
               were reported, of which 1,347 were non-serious AEFI and 312
               were serious AEFI.
               [France; Report] Six reports of serious adverse effects with a
               favourable outcome were reported in France during the 3rd week
               of vaccination: 4 cases of allergic reactions and 2 cases of                        [32]
               tachycardia. Around 30 cases of non-serious adverse effects have
               been reported since 12 Jan 2021
               [Norway; Report] As of 14 Jan 2021, 29 reports of side effects were
               reported in Norway. The 29 reports consisted of 13 deaths, 9
               serious side effects and 7 less serious side effects. The deaths were
               all amongst frail and elderly patients in nursing homes, aged at                    [33]
               least 80 years. Serious side effects reported included allergic
               reactions, strong malaise and severe fever. Less serious side
               effects include severe pain at injection site.
               [United States; Report] A healthcare worker in Alaksa experienced
               an allergic reaction to the Moderna COVID-19 vaccine, 10 minutes
                                                                                                   [34]
               within receiving it on January 12. There was no information on
               allergy history of the healthcare worker.
               [Israel, Report] At least 13 cases of mild facial paralysis have been
                                                                                                   [35]
               reported upon receiving the vaccine.
               [United Kingdom, Report] A severe adverse medical reaction was
               reported from a medical councillor aged 42 years within minutes
               after receiving his vaccine on 8 January 2021. The councilor
                                                                                                   [36]
               experienced breathing difficulties, fever and muscle aches, and
               was hospitalized for 1 day before his condition stabilized and
               eventually recovered.
               [Ireland, Report] As of 11 January 2021, 81 adverse events from
                                                                                                   [37]
               vaccination were reported, all involving expected mild side effects.

21 | P a g e    Centre for infectious disease epidemiology and research
For citation: Centre for Infectious Disease Epidemiology and Research-NUS.
                                                                           COVID-19 Situation Report 454. 28 April 2021

               [Singapore, Report] As of 27 January 2021, a total of 432 AEFIs
               were reported amongst the 113,000 people who received the
               vaccine. All reports were mild and reported expected side effects
               arising from vaccination, except for 3 cases of anaphylaxis (SAE)
               reported. The cases were in their 20s and 30s, had a history of
               allergies, but no history of anaphylaxis which would have
                                                                                                     [38]
               precluded them from receiving the vaccine. All 3 cases have
                                                                                                     [39]
               recovered and were discharged from the hospital after a day’s
               observation or treatment.

               [Update] As of February 1, 2021 all four cases of anaphylaxis
               following vaccination have recovered, with none requiring
               intensive care unit support.
               [Belgium, Report] As of January 26, 2021 a total of 262 AEFIs were
               reported out of 243,412 vaccines administered, of which 37 were
                                                                                                     [40]
               serious AEFIs. Of the serious AEFIs reported, 14 were deaths
               amongst those aged over 70 years (9 deaths) or 90 years (5 years).
               [Croatia, Report] As of February 1, 2021 a total of 430 AEFIs were
               reported, of which 26 were allergic reactions and the rest were
                                                                                                     [41]
               mild side effects. The allergic reactions included 2 serious
               reactions, and 24 milder reactions.
               [United Kingdom; Report] A study conducted by Zoe, a British
               health science company had found that 37% of about 40,000
               vaccinees in UK who were mostly healthcare workers had reported
               local side effects (e.g. swelling or pain near injection site) after first
                                                                                                     [42]
               dose and 45% after second dose. Systemic side effects (e.g.
               fatigue) were rare with 14% after first dose and 22% after second
               dose. The side effect reported were lower as compared to FDA
               trials.
               [Romania; Report] A doctor from Valcea county had experienced
               temporary facial paralysis after receiving the second dose and has
               since fully recovered. This is the first rare and major side effect
                                                                                                     [43]
               reported in Romania. Since 27 Dec, there has been more than
               2,100 common and minor side effects reported with a total of
               629,279 people vaccinated by 4 Feb.
               [United Kingdom; Report] The Medicines and Healthcare products
               Regulatory Agency (MHRA) had reported on the side effects of 7
               million vaccine doses (5.4 million Pfizer/BioNTech & 1.5 million of
               the AstraZeneca) administered by 24 Jan. Yellow card system was
               used for vaccinated people to report side effect. There was an
               average of 3 yellow cards per 1,000 doses administered. There
                                                                                                     [44]
               were 16,756 yellow card for the Pfizer-BioNTech vaccine; 6,014 for
               the Oxford University-AstraZeneca vaccine and 50 for unspecified
               brand of the vaccine. Most reports were related to injection site or
               otherwise generalized symptoms (e.g. flu-like illness). These
               symptoms had occured shortly after vaccination and were not
               associated with more serious or lasting illness.
               [Netherland; Report] 15 elderly had died within 9 days after
               administered with vaccine. Most of them with fatal outcome had
                                                                                                     [45]
               multiple underlying health issues or serious health problem. Half
               of them had symptoms identified as side effects e.g. fever after

22 | P a g e    Centre for infectious disease epidemiology and research
For citation: Centre for Infectious Disease Epidemiology and Research-NUS.
                                                                        COVID-19 Situation Report 454. 28 April 2021

               vaccination. These may have contributed to the deterioration of
               their health.

               A total of 2,812 side effects have been reported after vaccinated.
               95% were administered with Pfizer/BioNTech vaccine, 113 cases
               were Moderna vaccine and vaccine used for 38 reports were not
               clear. 14 people who had epilepsy also had seizure after
               vaccination. Some 25 people had severe allergic reaction to
               Pfizer/BioNTech vaccine with 8 cases determined as anaplylactic
               response.
               Both the Pfizer and Moderna vaccines can cause lymph nodes to
               swell, particularly those in the armpit on the side where the shot                 [46]
               was received.
               [France; Report] Between December 27 and February 18, France
               recorded 5,331 unwanted side effects out of 3,330,296 injections.
               The most common side-effects included flu-like symptoms, such as
               fever and muscle pain, and were more prominent after the second                    [47]
               dose. There were 75 cases of serious high blood pressure that led
               to symptoms like dizziness, 56 cases of cardiac issues and 10 cases
               of facial paralysis.
               [Australia, Report] The first serious AEFI in Australia involved
               anaphylactic reaction in a Queensland nurse following vaccination.
                                                                                                  [48]
               The nurse has a history of anaphylaxis and have since recovered
               from the reaction.
               [Japan, Report] The first serious AEFI in Japan involved
               anaphylactic reaction in a female Japanese medical worker in her
               30s, following vaccination on 5 March 2021. The medical worker
               has a history of asthma, and whose condition have improved after
               taking proper medicine.

               [Japan, Update] Five more anaphylaxis cases following vaccination
               were reported through Japan on 8 March 2021, bringing the total
               number of such cases to 8. The new cases occurred in women in
                                                                                                  [49]
               their 20s to 50s, of which four had asthma or a history of other
                                                                                                  [50]
               drug allergies. All cases’ condition improved after taking
                                                                                                  [51]
               medication. Anaphylaxis reaction was linked for vaccination for
               three of the cases, while the causal relationship was unclear or
               impossible to evaluate in the remaining 2 cases.

               [Japan, Update] A total of 25 cases of anaphylaxis were reported
               amongst 148,000 doses administered as of 10 March 2021. The
               cases were primarily women (24 cases). The anaphylaxis rate in
               Japan is relatively higher than that reported in United States (5
               cases/million doses) and Britain (20 cases/million doses)
               [Australia; Report] As of 16 March, 19 reports of anaphylaxis were
               reported nationally after vaccinated with Pfizer (14 reports) and
                                                                                                  [52]
               AstraZeneca (5 reports). More than 183,000 doses have been
               administered.

23 | P a g e    Centre for infectious disease epidemiology and research
For citation: Centre for Infectious Disease Epidemiology and Research-NUS.
                                                                         COVID-19 Situation Report 454. 28 April 2021

               [Hong Kong Report] A chronically ill 66-year-old man died on
               March 19, three days after receiving the BioNTech vaccine. He was
               the eighth person to die after getting a jab since vaccination was
                                                                                                   [53]
               launched. The previous seven chronically ill people died after
               receiving the Chinese-made Sinovac jab. But no link between the
               deaths and the jabs has been established so far.
               [Hong Kong, Report] As of March 26, there has been 1 known
               report of Bell’s palsy following vaccination with the Pfizer-
                                                                                                   [54]
               BioNTech vaccine in Hong Kong. No direct link was found between
               the cases and the vaccinations.
               [Japan, Report] As of March 21, 47 cases of anaphylaxis have been
               reported after 580,000 doses of Pfizer-BioNTech vaccine
               administered. This implies an anaphylaxis rate of 81 cases per 1
               million doses administered, much higher than 5 in every 1 million                   [55]
               doses in the United States and 20 cases per million doses in
               Britain. The rate is subject to change since Japan is further behind
               in the vaccination rollout.
               [United Kingdom, Report] A 2 reports of blood clot in the brain
                                                                                                   [56]
               have been reported amongst recipients as of 24 March 2021.
               [Australia; Report] As on 28 March 2021, 36.3% of 80,533 people
               receiving the vaccine reported adverse events after the first dose
                                                                                                   [57]
               while 60.7% reported at least one AE following their second dose
               since vaccination started on 22 February 2021.
               [Hong Kong; Report] Two pregnant women had suffered from
               miscarriages after administered with the BioNtech vaccine but                       [58]
               links with the vaccination has not been established.
               [New Zealand; Report] From 20 Feb to 13 Mar, 22,588 doses were
               administered with 65 new non serious and 3 new serious cases
               reported from the last update. Two of the serious cases were
                                                                                                   [59]
               allergic reaction while the third case was a reactogenicity reaction.
               Previous report up to 6 Mar has identified 147 adverse reactions
               including 3 serious reactions.
               [Israel; Report] Herpes zoster reactivation (shingles) identified in
               six vaccinated patients with comorbid autoimmune/ inflammatory
                                                                                                   [60]
               diseases in two centers since Dec 2020 suggest new adverse event
               linked to the vaccine.
               [Saudi Arabia, Publication] A cross sectional study was conducted
               with 455 Saudi Arabia inhabitants. Common side-effects were
               injection site pain, headaches, flu-like symptoms, fever, and
               tiredness, less common side effects were fast heartbeat, whole
               body aches, difficulty breathing, joint pain, chills, and drowsiness
                                                                                                   [61]
               and rare side effects were Bell’s palsy and lymph nodes swelling
               and tenderness. There were more reports on difficulty of
               breathing in recipients who were previously infection as compare
               to not infected. Most side effects reported were consistent with
               the vaccine’s fact sheet for recipients and caregiver.
               [United Kingdom, Report] Based on the UK’s Yellow Card tool,
               there were 2.5 time more cases of severe side effects and related
                                                                                                   [62]
               death after vaccinated with Pfizer than with AstraZeneca. As of 5
               April, there were 22 fatalities among 21.6 million doses of

24 | P a g e    Centre for infectious disease epidemiology and research
For citation: Centre for Infectious Disease Epidemiology and Research-NUS.
                                                                         COVID-19 Situation Report 454. 28 April 2021

               AstraZeneca and 40 fatalities among 15.4 million doses of Pfizer
               administered.
               [Croatia, Report] Out of a total of 750,000 doses of the COVID-19
               vaccine administered in Croatia by April 22, side effects were
               reported in only 0.4 percent of cases. Out of a total of 2667
               reports, there were 1297 side effects for Pfizer / BioNTech's                       [63]
               vaccine, 1166 for AstraZeneca, and 202 for Moderna. Eighty-one
               percent were mild health problems, while 19 percent were more
               severe.
               [Estonia, Report] Seven serious side effects were reported last
               week after vaccination, two with the Pfizer/BioNTech Comirnaty
               vaccine (thrombosis), one with the Moderna vaccine
               (thrombosis) and four with the AstraZeneca Vaxzevria vaccine                        [64]
               (thrombocytopenia, visual impairment - retinal detachment,
               deep vein thrombosis and headaches and photosensitivity). Any
               causal link is yet to be established.
               [United States; Report] The FDA advisory committee has noted a
               special side effect of the vaccine from the clinical trials involving
               several patients with cosmetic facial fillers. The patients who
                                                                                                   [65]
               experienced side effect all had swelling and inflammation in the
               area that was given the filler. All reactions were resolved following
               treatment with steroids and antihistamines.
               [United States; Report] A Boston doctor experienced severe
               allergic reactions after receiving the Moderna COVID-19 vaccine on                  [66]
               December 24. The doctor has a history of shellfish allergy.
               [Canada; Report] On December 17, the US FDA reported two cases
               of adverse reactions in individuals who had received the Moderna
               vaccine. Both patients previously had dermal fillers and
               experienced some swelling following the vaccination. The cases
               were likely to have occurred in Toronto, Canada.
                                                                                                   [67]
               [Canada; Surveillance] As of 5 Feb, a total of 280 adverse effects                  [68]
               were reported which include 25 serious AEFI and 255 non-serious                     [69]
 Moderna       AEFI.

               [Canada; Surveillance] As od 26 March 2021, a total of 1,165 AEFIs
               were reported, of which 1,106 were non-serious AEFIs and 59
               were serious AEFIs.
               [United States; Report] A frontline worker in Robstown had
               experienced immediate numbness on the face after receiving the
                                                                                                   [70]
               vaccine a week ago but continues to have soreness and redness to
               her arms.
               [United States; Publication] Phase 3 clinical trial involving 30,420
               volunteers had observed higher frequency of moderate, transient
               reactogenicity after vaccination in the vaccine group. Serious
               adverse events were rare and the incidence was similar between
                                                                                                   [71]
               the placebo and vaccine groups. Hence there were no safety
                                                                                                   [72]
               concern, apart from the transient local and systemic reactions.

               [Update] The vaccine showed a 94.1% efficacy rate in its phase 3
               trial, and serious adverse events occurred in just 0.6% of patients.

25 | P a g e    Centre for infectious disease epidemiology and research
For citation: Centre for Infectious Disease Epidemiology and Research-NUS.
                                                                         COVID-19 Situation Report 454. 28 April 2021

               A total of 2 deaths were reported in the vaccine group, one was
               due to cardiopulmonary arrest and the other was a suicide.
               [United States; Report] On 31 December, the Oregon Health
               Authority reported a case of anaphylaxis after a healthcare worker                  [73]
               had taken the vaccine this week and is recovering in the hospital.
               [Guidance] A new guidance from the American Society for
               Dermatologic Surgery (ASDS) has been released regarding side
               effects from the SARS-CoV-2 mRNA vaccine on dermal fillers. FDA
                                                                                                   [74]
               data reports show three participants out of 15,184 who received
               at least one dose of Moderna’s mRNA-1273 vaccine have
               developed lip for facial swelling in areas of dermal filler placement.
               [United States; Report] A Missouri healthcare worker experienced
               severe allergic reaction after receiving the Moderna COVID-19
                                                                                                   [75]
               vaccine on December 29. The healthcare worker has a history of
               severe allergy reaction to MRI contrast dye.
               [United States, Report] Six reports of allergy reactions requiring
               medical attention 24 hours from vaccination, were reported
               amongst healthcare workers on 14 January 2021. The healthcare
               workers were vaccinated with lot 41L20A from the same
                                                                                                   [76]
               vaccination site in San Diego. The site is temporarily closed for
               now and using other vaccines. California health officials
               recommend suspending the use of lot 41L20A, until investigation
               are complete.
               [United States, Report] A fatality was reported in a resident from a
               retirement home, after receiving the vaccine. Investigation on
                                                                                                   [77]
               whether the fatality was linked to receiving the vaccine is
               underway.
               [United States, Report] As of January 29, 2021 a total of 287 AEFIs
               were reported amongst 250,000 vaccines administered in Texas, of
               which 11 were serious AEFIs. The 11 AEFI reports included the
               death of an 84 years-old woman, permanent disability in another
               patient, and the remaining spent at most 4 days hospitalized.                       [78]
                                                                                                   [79]
               [Update] As of 5 Feb, 2021, the The Centers for Disease Control
               had reported that 619,452 second doses have been administered
               in Texas with 15 significant reports of side effect. Only 4 of them
               required hospital stay that had lasted less than 5 days.
               [Croatia, Report] As of February 1, 2021 a total of 13 AEFIs were
                                                                                                   [80]
               reported, all of which were mild side effects.
               [USA, CDC; Report] A side effect of the Moderna vaccine reported
               by the CDC as arm pain and redness appears to be showing up a                       [81]
               bit delayed in some people up to a week.
               [France; Report] Since January 22, 148 cases of unwanted side
               effects were reported in France. A total of 129,510 people have
               received at least one doses of the Moderna vaccine. The side                        [82]
               effects were mainly skin issues, muscle pain, and digestive issues.
               Four people had severe side effects including cardiac problems.
               [United States, Report] A 39-years-old female with no known
               health problems or comorbidities died 4 days after her second
                                                                                                   [83]
               vaccine shot. Investigations are in progress to determine the link
               of the death with the vaccine.

26 | P a g e    Centre for infectious disease epidemiology and research
For citation: Centre for Infectious Disease Epidemiology and Research-NUS.
                                                                           COVID-19 Situation Report 454. 28 April 2021

                 [United States, Report] Boston researchers report delayed skin
                 reaction to Moderna COVID-19 vaccine which includes skin rash at                    [84]
                 the injection site and the timing of it might be confusing.
                 [Argentina; Report] Of the total 32,013 patients who had received
 Sputnik V       the vaccine, 1% (317 patients) had reported mild adverse reaction                   [85]
                 (fever and headache).
                 [India, Report] Ninety-three reports of adverse events following
                 immunization with Astrazeneca & Oxford Uni. ( and Bharat
                 Biotech) vaccines were reported from Delhi (51 mild and 1 serious
                 report), Haryana (13 mild reports), Maharashtra (14 mild reports)
                 and Kolkata (13 mild and 1 serious report). No fatalities have been
                 reported.

                 [Update] Between 16 January and 17 January, 447 reports of
                 adverse events following immunization have been reported across
                 India. Only 3 of the reports involved serious adverse events
                 requiring hospitalization, of which only 1 remains hospitalized.

                 [Update] 82 AEFIs were reported across India on 20 January 2021.
                 All AEFIs reported were mild cases.
                                                                                                     [86]
                                                                                                     [87]
                 [Update] On the 22 Jan, Day 4 of the coronavirus vaccination drive
                                                                                                     [88]
                 in Delhi, 5,942 people were reportedly administered the shots and
                                                                                                     [89]
                 adverse events following immunisation (AEFI) was reported in 24
                                                                                                     [90]
                 persons.
                                                                                                     [91]
                                                                                                     [92]
                 [Update] On 24 Jan, the fifth day of India’s Covid-19 vaccination
 Astrazeneca &                                                                                       [93]
                 drive, the city of Gurugram reported 3 cases of AEFI amongst 3,055
 Oxford Uni.                                                                                         [94]
                 shots administed.
                                                                                                     [95]
                                                                                                     [96]
                 [Update] The Union Ministry of Health and Family Welfare in India
                 announced 23 January that over 10 lakh people had already been
                 immunised in the first six days (up to 21 January), but the total
                 number of AEFIs reported by the ministry in its daily press releases
                 so far adds up to 1,239 out of 15,37,190 inoculations, or 0.08 per
                 cent. Just 11 people have had to be hospitalised (0.0007 per cent),
                 while seven deaths have been reported — six of which are “not
                 causally linked” to the vaccine, while in the seventh case, the post
                 mortem report is awaited.

                 [Update] A total of 19,50,183 beneficiaries were inoculated in
                 35,785 sessions till 7.10 pm on Monday 25 Jan, including 3,34,679
                 in 7,171 sessions during the day, the ministry said. A total of 348
                 adverse events following immunisation (AEFIs) were reported till
                 7.10 pm on 25 Jan, the 10th day of the vaccination drive.

                 [Update] A total of 213 ARFIs were reported up till 7 pm on
                 January 29, 2021 across India, of the 33,68,734 vaccines
                 administered

27 | P a g e      Centre for infectious disease epidemiology and research
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