Evaluation and Management of the Infant Exposed to HIV in the United States

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CLINICAL REPORT            Guidance for the Clinician in Rendering Pediatric Care

                           Evaluation and Management of the
                           Infant Exposed to HIV in the
                           United States
                           Ellen Gould Chadwick, MD, FAAP,a Echezona Edozie Ezeanolue, MD, MPH, FAAP,b,c COMMITTEE ON PEDIATRIC AIDS

Pediatricians play a crucial role in optimizing the prevention of perinatal               abstract
transmission of HIV infection. Pediatricians provide antiretroviral prophylaxis
to infants born to women with HIV type 1 (HIV) infection during pregnancy and
to those whose mother’s status was first identified during labor or delivery.
Infants whose mothers have an undetermined HIV status should be tested for                a
                                                                                            Department of Pediatrics, Feinberg School of Medicine, Northwestern
HIV infection within the boundaries of state laws and receive presumptive                 University and Ann & Robert H. Lurie Children’s Hospital of Chicago,
                                                                                          Chicago, Illinois; bHealthySunrise Foundation, Las Vegas, Nevada; and
HIV therapy if the results are positive. Pediatricians promote avoidance of               c
                                                                                           Department of Pediatrics, College of Medicine, University of Nigeria,
postnatal HIV transmission by advising mothers with HIV not to breastfeed.                Nsukka, Nigeria
Pediatricians test the infant exposed to HIV for determination of HIV infection
                                                                                          Clinical reports from the American Academy of Pediatrics benefit from
and monitor possible short- and long-term toxicity from antiretroviral                    expertise and resources of liaisons and internal (AAP) and external
                                                                                          reviewers. However, clinical reports from the American Academy of
exposure. Finally, pediatricians support families living with HIV by providing            Pediatrics may not reflect the views of the liaisons or the
counseling to parents or caregivers as an important component of care.                    organizations or government agencies that they represent.

                                                                                          The guidance in this report does not indicate an exclusive course of
                                                                                          treatment or serve as a standard of medical care. Variations, taking
                                                                                          into account individual circumstances, may be appropriate.

                                                                                          All clinical reports from the American Academy of Pediatrics
INTRODUCTION                                                                              automatically expire 5 years after publication unless reaffirmed,
                                                                                          revised, or retired at or before that time.
Each year approximately 8500 women with HIV infection give birth in the
United States.1 Through the implementation of effective, cost-saving2                     This document is copyrighted and is property of the American
                                                                                          Academy of Pediatrics and its Board of Directors. All authors have filed
preventive strategies during pregnancy, the rate of perinatal transmission                conflict of interest statements with the American Academy of
of HIV has remained low at ,1% to 2%.1 These preventive strategies                        Pediatrics. Any conflicts have been resolved through a process
                                                                                          approved by the Board of Directors. The American Academy of
include (1) the provision of universal opt-out HIV testing for all pregnant               Pediatrics has neither solicited nor accepted any commercial
women and for those who have HIV infection, administration of                             involvement in the development of the content of this publication.
combination antiretroviral therapy (ART) during pregnancy and labor;                      DOI: https://doi.org/10.1542/peds.2020-029058
(2) planned cesarean delivery before the onset of labor and rupture of                    Address correspondence to Ellen Gould Chadwick, MD.
membranes for pregnant women with an HIV viral load of .1000 copies                       E-mail: EGChadwick@luriechildrens.org
per mL before delivery; (3) provision of antiretroviral prophylaxis to the                PEDIATRICS (ISSN Numbers: Print, 0031-4005; Online, 1098-4275).
infant exposed to HIV for 4 to 6 weeks; and (4) complete avoidance of
                                                                                          Copyright © 2020 by the American Academy of Pediatrics
breastfeeding. Perinatal transmission occurs mostly when there is failure
of implementation of these strategies, outlined in a separate 2008
American Academy of Pediatrics (AAP) policy statement titled “HIV                             To cite: Chadwick EG, AAP COMMITTEE ON PEDIATRIC AIDS.
                                                                                              Evaluation and Management of the Infant Exposed to HIV
Testing and Prophylaxis to Prevent Mother-to-Child Transmission in the
                                                                                              in the United States. Pediatrics. 2020;146(5):e2020029058
United States.”3,4 This clinical report offers guidance on the evaluation and

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PEDIATRICS Volume 146, number 5, November 2020:e2020029058                               FROM THE AMERICAN               ACADEMY OF PEDIATRICS
management of infants born to               during the current pregnancy) should            to breastfeed is also made during the
women with HIV infection.                   have HIV testing repeated in the third          prenatal period. The current US
In addition to standard clinical care       trimester.8 A plasma HIV RNA test is            Department of Health and Human
for the newborn infant, it is important     recommended in addition to routine              Services (HHS) Panel on Treatment of
that appropriate steps are taken for        antigen/antibody immunoassay                    Pregnant Women With HIV Infection
early detection of HIV infection,           testing when the possibility of acute           and Prevention of Perinatal
appropriate vaccines are                    retroviral syndrome is suspected in             Transmission (Perinatal Guidelines
administered, and adequate                  a pregnant woman.9                              Panel) recommends the use of
counseling is provided to families                                                          a combination of at least 3
living with HIV infection. The                                                              antiretroviral drugs during pregnancy
                                            TESTING OF THE INFANT WHEN THE
management of infants in whom                                                               and labor for all pregnant women
                                            MOTHER’S HIV INFECTION STATUS IS
HIV infection is diagnosed should           UNKNOWN                                         with HIV infection regardless of the
be undertaken in consultation                                                               plasma HIV RNA viral load or CD41
                                            When the HIV status of the mother is            T-lymphocyte count.11
with a pediatric HIV specialist.            unknown, expedited HIV testing
This report updates previous AAP            should be performed on the infant
recommendations.5                                                                           Interventions During Labor and at
                                            after consent procedures consistent             Delivery
                                            with state and local law. Expedited
IDENTIFICATION OF MATERNAL HIV              HIV antigen/antibody testing allows             Pregnant women with HIV infection
INFECTION                                   timely identification of HIV infection           generally continue the routine dosing
                                            in women whose HIV status is                    schedule of their ART regimen during
Although there has been a dramatic                                                          labor if possible. Intravenous
decrease in the number of new HIV           unknown late in pregnancy, during
                                            labor, or in the immediate postpartum           zidovudine (ZDV), also known as
infections in infants in the United                                                         azidothymidine (AZT), is added for
States since 1994, when antiretroviral      period and is generally available on
                                            a 24-hour basis at all facilities with          pregnant women with HIV RNA
prophylaxis was first documented to                                                          .1000 copies per mL close to
prevent perinatal transmission,             maternity services and/or a neonatal
                                            care unit. Positive HIV antigen/                delivery and may be considered for
transmission continues to occur,                                                            RNA levels between 50 and 999
albeit rarely.1 Documented cases of         antibody test results should be
                                            urgently reported to health care                copies per mL, but it is no longer
perinatal transmission declined                                                             recommended for pregnant women
rapidly after the adoption of the           providers so that presumptive HIV
                                            therapy can be initiated in the infant          with documented HIV RNA levels
recommendation by the Centers for                                                           ,50 copies per mL near delivery.12
Disease Control and Prevention              as soon after birth as possible and
                                            ideally within 6 to 12 hours of life. In        Planned cesarean delivery before
(CDC), the AAP, and the American                                                            labor and the rupture of membranes
College of Obstetricians and                addition, breastfeeding should be
                                            postponed, and the infant should be             at 38 weeks’ gestation is
Gynecologists for routine HIV testing                                                       recommended for all pregnant
for all pregnant women in the United        given formula feedings. If
                                            supplemental test results are                   women with HIV RNA levels of
States. HIV testing is now part of                                                          $1000 copies per mL near the time
routine prenatal care in most states        negative, antiretroviral drugs should
                                            be stopped, and breastfeeding may be            of delivery regardless of maternal HIV
unless the patient declines, which is                                                       treatment.13 Cesarean delivery solely
also known as “opt-out” consent or          reinstated.8
                                                                                            for the prevention of transmission is
“right of refusal.”6,7 A second HIV test                                                    not recommended for pregnant
during the third trimester, preferably      STRATEGIES FOR PREVENTION OF                    women with HIV RNA levels ,1000
before 36 weeks’ gestation, has been        PERINATAL HIV TRANSMISSION                      copies per mL because of the low risk
found to be cost-effective even in low-                                                     of perinatal transmission of HIV in
prevalence areas and should be              Maternal Treatment During
                                            Pregnancy                                       this group and the increased risk of
considered for all pregnant women.2                                                         complications with a major surgical
In particular, pregnant women at high       Most women with HIV infection in the            procedure.13
risk for incident HIV infection (eg,        United States have access to free
those who are incarcerated, reside in       prenatal care, which allows for the             Women who present in labor with
communities with an HIV incidence           initiation of effective ART in women            unknown HIV status should receive
greater than 1 per 1000 per year,           in whom HIV is newly diagnosed or               expedited HIV testing with
inject drugs, exchange sex for money        continuation of treatment in those              a combined HIV antigen/antibody
or drugs, are sex partners of               who are currently receiving ART.10              test. If the screening result is positive,
individuals living with HIV, or have        The determination of the appropriate            supplemental testing with an HIV-1/
had a new or more than 1 sex partner        mode of delivery and the decision not           HIV-2 antibody differentiation

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2                                                                                               FROM THE AMERICAN ACADEMY OF PEDIATRICS
immunoassay and HIV RNA testing                 or raltegravir (RAL) to construct                antiretroviral prophylaxis regimens
should be performed urgently,                   a presumptive HIV therapy regimen                for different clinical scenarios and
and intravenous ZDV should be                   (see tables in ref 15).15 This 3-drug            provide specific neonatal
initiated pending the result of the             combination antiretroviral drug                  antiretroviral dosing
supplemental test.12 Prompt                     regimen is recommended for infants               recommendations.
initiation of intravenous ZDV,                  born to mothers who (1) received
                                                                                                 The administration of ZDV (possibly
followed by infant antiretroviral               prenatal antiretroviral drugs but had
                                                                                                 with other antiretroviral agents) to
prophylaxis, may decrease the risk of           suboptimal viral suppression at
                                                                                                 the infant should be initiated as soon
perinatal transmission of HIV in these          delivery, (2) received only
                                                                                                 as possible after birth and certainly
settings.14 Cesarean delivery before            intrapartum antiretroviral drugs,
                                                                                                 within 6 to 12 hours after delivery.27
rupture of membranes, if feasible,              (3) received no antepartum or
                                                                                                 If the infant’s HIV exposure is first
may also be considered, but there is            intrapartum antiretroviral drugs, or
                                                                                                 recognized between 12 and 48 hours
insufficient evidence to determine if            (4) have known drug-resistant virus.
                                                                                                 after delivery, presumptive HIV
cesarean delivery during labor                  Decisions about using a combination
                                                                                                 therapy should be initiated in that
reduces perinatal transmission.13 If            antiretroviral regimen over ZDV
                                                                                                 time period.15 Data from animal
the supplemental results are negative,          monotherapy can be made after
                                                                                                 studies indicate that the longer the
maternal and infant antiretroviral              balancing the benefits of enhanced
                                                                                                 delay in institution of prophylaxis, the
prophylaxis should be stopped.                  prevention of perinatal transmission
                                                                                                 less likely that infection will be
                                                of HIV infection over possible toxicity
Antiretroviral Management for the                                                                prevented. In most animal studies,
                                                from multiple drugs. The most
Infant Exposed to HIV                                                                            antiretroviral prophylaxis initiated 24
                                                information about the use of
                                                                                                 to 36 hours after exposure is not as
Postnatal antiretroviral drugs should           antiretroviral combinations in
                                                                                                 effective for preventing infection.28–30
be provided to all infants exposed to           neonates is available for older
HIV to reduce the risk of perinatal             regimens such as ZDV in combination              The full course of drug supply needed
HIV transmission. Antiretroviral                with either single-dose                          for the entire 4 to 6 weeks should be
prophylaxis is defined as the                    nevirapine16–19 or 3 doses of                    supplied to the infant before
administration of 1 or more                     nevirapine in the first week of life20            discharge from the hospital
antiretroviral drug(s) to a newborn             or the dual combination of ZDV and               irrespective of availability of out-of-
infant without confirmed HIV                     lamivudine.21–24                                 pocket payment or insurance
infection to reduce the risk of HIV                                                              coverage because pediatric
acquisition, whereas presumptive HIV            When making decisions to use                     antiretroviral formulations are not
therapy consists of the administration          combination antiretroviral drugs,                widely available in commercial
of a 3-drug combination antiretroviral          consultation with a pediatrician                 pharmacies.15
regimen to newborn infants at                   experienced in the care of children
highest risk of HIV acquisition.                with HIV infection or the National               Avoidance of Postnatal HIV Infection
Presumptive HIV therapy is intended             Clinician Consultation Center                    Postnatal transmission of HIV
to be preliminary treatment of                  (https://nccc.ucsf.edu/clinician-                through ingestion of human milk
a newborn infant who is later                   consultation/perinatal-hiv-aids/) is             from a mother with HIV infection is
confirmed to have HIV infection but              beneficial. Monitoring for hematologic            well documented, and prolonged
also serves as prophylaxis against              toxicity is necessary for any                    breastfeeding from untreated
perinatal transmission. Prophylaxis             combination of ZDV and lamivudine                mothers has resulted in rates as high
has historically been achieved by               compared to ZDV alone. Long-lasting              as 9% to 15%.31 However, studies in
giving a 6-week neonatal ZDV                    resistance is possible if the infant is          low-resource countries have revealed
chemoprophylaxis regimen. However,              already infected when prophylaxis is             that maternal and/or infant
term infants born to women who                  given; this was most evident when                antiretroviral drug administration
received ART during pregnancy with              nevirapine was used as a single agent            during lactation reduces the risk of
documented viral suppression can be             for prophylaxis.25 The HHS Panel on              HIV transmission to the infant via
given a 4-week course.15 In higher-             Treatment of Pregnant Women with                 human milk.32,33 Because the risk of
risk cases, experts on the Perinatal            HIV Infection and Prevention of                  infant mortality from infectious
Guidelines Panel recommend                      Perinatal Transmission15 and Panel               diseases and malnutrition is low in
combining a 6-week infant ZDV                   on Antiretroviral Therapy and                    the United States and effective
prophylaxis regimen with 2                      Medical Management of Children                   alternative sources of feeding are
additional antiretroviral drugs                 Living with HIV26 each publish an                readily available, women with HIV
including lamivudine (also known as             extensive discussion of                          infection, including those receiving
“3TC”) and either nevirapine (NVP)              considerations for infant                        ART, should be counseled not to

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PEDIATRICS Volume 146, number 5, November 2020                                                                                          3
breastfeed their infants or donate         Supplemental Nutrition Program for              Passively transferred maternal HIV
their milk.34 Although maternal ART        Women, Infants, and Children, are               antibodies may be detectable in an
has been shown to reduce the               helpful in many cases. Evaluation of            exposed but uninfected infant’s
concentration of cell-free HIV in          infant feeding practices with                   bloodstream until approximately
human milk, it does not affect the         suggestions for safer feeding options           18 months of age. Therefore, routine
amount of cell-associated virus in         and advice against premastication               serological testing of infants exposed
human milk.35 In addition,                 (the practice of prechewing solid food          to HIV and children before the age of
discordance between the viral load in      before feeding it to another), which is         18 months is generally only
plasma and human milk has been             a potential risk factor for HIV                 informative if the test result is
observed. There is also differential       transmission, are indicated.38                  negative.
penetration of antiretroviral drugs
into human milk, with some                                                                 Polymerase chain reaction (PCR)
                                           Framework for the Total Elimination of
antiretroviral drugs having                                                                assays that directly detect HIV DNA
                                           Perinatal Transmission of HIV
concentrations in human milk that                                                          or RNA (generically referred to as HIV
                                           Several strategies have been                    nucleic acid amplification tests
are higher than in maternal plasma,        documented that could potentially
and others have lower or                                                                   [NAATs]) represent the gold standard
                                           lead to the elimination of perinatal            for diagnostic testing of infants and
undetectable human milk                    transmission of HIV. Early detection
concentrations.36 These factors raise                                                      young children younger than 18
                                           of HIV infection in the mother and              months. With such testing, the
concerns about infant drug toxicity        evaluation and management of
and the potential for selection of                                                         diagnosis or the presumptive
                                           infants exposed to HIV remain the key           exclusion of HIV infection can be
drug-resistant virus within human          to preventing perinatal transmission.
milk. Therefore, in the United States,                                                     established within the first several
                                           This involves coordination of clinical          weeks of life among nonbreastfed
where safe alternatives to                 care and social services, long-term
breastfeeding are available, all                                                           infants. Although neonatal
                                           follow-up of infants exposed to HIV,            antiretroviral drugs may decrease the
women with HIV infection should            and ongoing HIV surveillance.39 In
avoid breastfeeding.37                                                                     concentration of HIV RNA in infant
                                           many cases, early detection is not              plasma in the first 6 weeks of life,42
                                           achieved because of social issues such          HIV DNA PCR results generally
Cultural differences require that
                                           as lack of access to mental,                    remain positive in most individuals
counseling the mother about the
                                           preventive, and general health care or          taking ART who have undetectable
avoidance of breastfeeding should be
                                           substance use.40,41 Interventions               plasma HIV RNA. The sensitivity of
conducted in a sensitive manner. For
                                           targeted to at-risk populations can             both DNA and RNA PCR testing is
some women, not being able to
                                           minimize missed opportunities for               high,43,44 so either can be used for the
breastfeed may be the hardest
                                           the prevention of perinatal                     diagnosis of HIV infection in
component of their effort to protect
                                           transmission of HIV. To be most                 infancy.45 False-positive results with
their newborn infant from acquiring
                                           effective, these efforts should be              low-level viral copy numbers have
HIV infection.37 Other mothers,
                                           sustained and involve integrated                been described when using HIV RNA
particularly those who have
                                           clinical management and social                  assays,42,46,47 reinforcing the
emigrated from parts of the world
                                           services.39                                     importance of repeating any positive
where breastfeeding is nearly
universal, may feel that formula                                                           assay result to confirm the diagnosis
feeding their infant discloses their                                                       of HIV infection in infancy. False-
                                           CARE OF THE INFANT EXPOSED TO HIV
own HIV infection to family or                                                             negative results occur rarely, and
friends. As a result, recommendations      Testing to Determine the Infant’s HIV           retesting could be considered
to prevent perinatal transmission          Infection Status                                (perhaps by using a different test) if
may not always be followed. Open,          Identification of the infant born to             clinical findings suggest the presence
nonjudgmental communication about          a mother with HIV infection and early           of HIV infection.
feeding practices facilitates              determination of the presence or
appropriate follow-up and testing of       absence of HIV infection in the infant          Detection of Non–Subtype B HIV and
all infants, including those whose         are critical to allow early initiation of       HIV-2
mothers choose to breastfeed after         prophylaxis or presumptive HIV                  For infants born to women known or
appropriate counseling.34 Education        therapy and provision of needed care.           suspected to have infection with non-
covering appropriate formula feeding       Appropriate HIV diagnostic testing              B subtypes of HIV, use of HIV RNA
and the cost of formula can be             for infants and children younger than           assays may be preferable to the use of
provided to women. Referrals,              18 months differs from that for older           HIV DNA assays for diagnostic testing.
including enrollment in the Special        children, adolescents, and adults.              Women who acquire HIV infection in

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4                                                                                              FROM THE AMERICAN ACADEMY OF PEDIATRICS
North America are most commonly                 additional virological diagnostic                               first week of life and a subsequent
infected with HIV subtype B.48                  testing at birth as well as 2 to 4 weeks                        positive test result are considered
Women who acquire HIV outside of                after cessation of antiretroviral                               to have intrapartum infection.55
North America are often infected with           prophylaxis should be considered.12                             Cord blood specimens are not
other HIV subtypes. Subtypes C and D                                                                            used for HIV RNA or DNA testing
predominate in southern and eastern             An HIV NAAT should be performed at                              because they are associated with
Africa, subtype C predominates on               birth or in the first few days of life for                       an unacceptably high rate of false-
the Indian subcontinent, and subtype            infants at highest risk of infection,                           positive test results.
E predominates in much of Southeast             including those whose mothers
Asia.48 HIV DNA PCR assays may be               received no antiretroviral drugs                                When a mother’s HIV status is
less sensitive in the detection of non-         during pregnancy, when maternal                                 unknown at delivery or after birth,
B subtype HIV, and false-negative HIV           prophylaxis was started late in                                 expedited HIV testing (preferably
DNA PCR assay results have been                 pregnancy or during labor, or if the                            a combined test for HIV antigen and
reported in infants infected with non-          mother had primary HIV infection                                antibody) for mother and/or infant
B subtype HIV.49,50 Some of the                 during pregnancy. In the absence of                             should be performed. In the event of
currently available HIV RNA assays              maternal ART, as many as 30% to                                 a positive initial test result,
have improved sensitivity for                   40% of infants with HIV infection can                           presumptive HIV therapy is initiated
detection of non-B subtype HIV                  be identified by 48 hours of age.53,54                           in the infant as soon as possible
infection, although even these assays           Infants with a positive NAAT result at                          pending the result of a supplemental
may not detect all non-B subtypes,              or before 48 hours of age are                                   test.15 Treatment should be stopped if
such as the uncommon group O HIV                considered to have in utero infection                           results of supplemental testing with
strain. When testing infants                    with HIV, whereas infants who have                              HIV antibody and a NAAT are
suspected of infection with non-B               a negative NAAT result during the                               negative.
subtype HIV, consultation with
a pediatrician experienced in the care
                                                TABLE 1 Evaluation and Treatment of the Infant Exposed to HIV-1 (Birth to 18 Months of Age), in
of infants and children with HIV
                                                            Addition to Routine Pediatric Care and Immunizations
infection is recommended.                               a
                                                  Action                                                                             Infant Age
HIV-2 is a retrovirus similar to HIV                                                                           Birth 14 d 4 wk 6 wk 8 wk 4 mo                  12–18
and is found most commonly in                                                                                                                                   mo
western Africa. It is less virulent, with         Antiretroviral prophylaxis or presumptive HIV                  X       X      X       X     —       —          —
a slower rate of progression of clinical             therapyb
disease and lower rates of perinatal              Recommend against breastfeeding and                            X       X      X       X      X       X         X
                                                     premastication
transmission.51 However, NAATs for
                                                  Hemoglobin or complete blood cell count                        X      —      Xc      —       Xc     —          —
HIV will not identify HIV-2, so if                HIV-1 DNA or RNA PCR assayd                                    e
                                                                                                                        Xf     X       —       g
                                                                                                                                                      X          —
infection with HIV-2 is suspected,                Initiate PCP prophylaxish                                     —       —      —       X      —       —          —
consultation with the CDC via the                 Antibody to HIV-1i                                            —       —      —       —      —       —          X
state department of health may be               X, indication to conduct the specified action; —, not applicable.
sought to help arrange specific HIV-2            a See the text for detailed discussion of each action. If during this period, HIV infection is diagnosed in the infant,

                                                laboratory monitoring and immunizations should follow guidelines for treatment of pediatric HIV infection.52
testing.                                        b Antiretroviral prophylaxis or presumptive HIV therapy, depending on the infant’s risk of acquiring HIV (see text) is

                                                initiated as soon as possible after birth but certainly within 6–12 hours. ZDV prophylaxis is continued for 4–6 weeks, at
                                                which time it is stopped.
Timing of Diagnostic Testing in                 c Checked at 4 weeks by some experts and rechecked at 8 weeks if the week 4 hemoglobin level was significantly low.
Infants With Known Perinatal                    d All infants exposed to HIV-1 should undergo virological testing for HIV-1 with HIV-1 DNA or RNA PCR assays at 14 to

Exposure to HIV                                 21 days of age and, if results are negative, they should be repeated at 1 to 2 and 4 to 6 months of age to identify or
                                                exclude HIV-1 infection as early as possible. Any positive test result at any age is promptly repeated to confirm the
For infants with known perinatal                diagnosis of HIV-1 infection.
exposure, it is recommended that                e HIV-1 DNA or RNA PCR assay testing in the first few days of life allows identification of in utero infection and should be

diagnostic testing with HIV DNA or              considered if maternal antiretroviral agents were not administered during pregnancy or in other high-risk situations. A
                                                negative test result at this age requires repeat testing to exclude HIV-1 infection.
RNA assays be performed at 14 to                f A negative test result at this age requires repeat testing to exclude HIV-1 infection. Presumptive uninfected indicates

21 days of age, and if results are              a negative NAAT result at $14 days and $4 weeks (1 month) of age; definitive uninfected indicates a negative NAAT result
negative, they should be repeated at 1          at $1 and $4 months of age (see text for complete details).
                                                g For higher-risk infants, additional virological diagnostic testing should be considered 2 to 4 weeks after cessation of
to 2 months of age and again at 4 to            antiretroviral prophylaxis (ie, at 8–10 weeks of life).
6 months of age (Table 1).52 For                h Infants with indeterminate HIV-1 infection status should receive prophylaxis starting at 4–6 weeks of age until they are

infants at a higher risk of perinatal           deemed to be presumptively or definitively uninfected with HIV-1. Prophylaxis is not recommended for infants who meet
                                                criteria for presumptive or definitive lack of HIV-1 infection; therefore, a NAAT at 2 and 4–6 weeks of age allows for
HIV transmission who receive                    avoidance of PCP prophylaxis if both results are negative.
multiple antiretroviral drugs,                  i Many experts confirm the absence of HIV-1 infection with a negative HIV-1 antibody assay result at 12–18 months of age.

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PEDIATRICS Volume 146, number 5, November 2020                                                                                                                          5
If an HIV NAAT for the newborn               use in infants who do not meet the              weeks, 3 months, and 6 months after
infant was not performed shortly             criteria for HIV infection noted                breastfeeding cessation.52
after birth, or if such test results were    above.52
negative, diagnostic testing with an                                                         Role of HIV Antibody Testing in
                                             In nonbreastfeeding infants younger             Infants Exposed to HIV
HIV NAAT is performed at 14 to
                                             than 18 months with no positive HIV
21 days of age because the diagnostic                                                        In infants exposed to HIV who are not
                                             NAAT results, presumptive exclusion
sensitivity of virological assays                                                            infected with HIV, maternal HIV
                                             of HIV infection is based on the
increases rapidly by 2 weeks of age.53                                                       antibodies transferred in utero may
                                             following:
This change in assay sensitivity                                                             persist through 18 months of age.
reflects the biology of perinatal             • two negative HIV RNA or DNA                   Loss of HIV antibody in an infant with
transmission, such that when HIV is            NAAT results, from separate                   previously negative HIV NAAT results
acquired at the time of delivery, it           specimens, both of which were                 (seroreversion) definitively confirms
may take up to 2 weeks for a NAAT to           obtained at $2 weeks of age and 1             that the infant is not infected with
be able to detect the virus.55                 of which was obtained at $4 weeks             HIV. Many infants exposed to HIV
Therefore, negative results of HIV             of age; or                                    serorevert to HIV antibody negativity
DNA PCR or RNA tests performed               • one negative HIV RNA or DNA                   by 12 months of age.57 Many experts
before 14 days of age are less helpful         NAAT result from a specimen                   confirm the absence of HIV infection
in excluding HIV infection acquired at         obtained at $8 weeks of age; or               with a negative HIV antibody assay
the time of birth than are results of        • one negative HIV antibody test                result at 12 to 18 months of age. If an
tests performed at or after 14 days            result obtained at $6 months                  infant exposed to HIV who is not
of age.                                        of age.                                       known to be infected is tested at
                                                                                             12 months of age and is still antibody-
Management if an HIV Virological             Definitive exclusion of HIV infection            positive, then testing should be
Test Result Is Positive                      in a nonbreastfed infant is based on            repeated at 18 to 24 months of age.
If any of the HIV NAAT results are           the following:                                  Performing the first antibody test at
positive, an immediate repeat HIV            • two or more negative HIV RNA or               18 months of age to confirm
NAAT is recommended to confirm the              DNA NAAT results, with 1 negative             seroreversion may avoid the cost and
diagnosis of HIV infection. A diagnosis        result at age $1 month and 1                  pain of performing 2 tests. Positive
of HIV infection can be made on the            negative result at age $4 months;             HIV antibodies at 24 months of age or
basis of 2 separate blood samples,             or                                            older may indicate HIV infection and
each of which is positive for HIV DNA        • two negative HIV antibody test                should be confirmed with an HIV
or RNA. If infection is confirmed,              results from separate specimens               virological test.26 A confirmed NAAT
a pediatric HIV specialist should be           obtained at age $6 months.                    result at or beyond 24 months of age
consulted for advice regarding ART                                                           in an infant with infection previously
                                             In the unusual case of an infant with
and care. HIV disease can progress                                                           excluded as outlined above suggests
                                             a positive HIV NAAT result followed
rapidly in infants with HIV infection,                                                       that the infant was infected after
                                             by a negative NAAT result, an expert
and neither CD41 T-lymphocyte                                                                infancy, such as through
                                             in the care of children with HIV
count nor HIV RNA copy number is                                                             breastfeeding, premastication of solid
                                             infection can be consulted for further
a reliable predictor of the risk of                                                          food by a caregiver with HIV
                                             testing recommendations.
disease progression in infants.53                                                            infection,34 or sexual abuse.
                                             Many experts confirm the absence of
Interpretation of Negative HIV Test          HIV infection with a negative HIV               Prevention of Pneumocystis jirovecii
Results                                      antibody assay result at 12 to                  Pneumonia
On the basis of analysis of HIV DNA or       18 months of age (see next section).            The most common severe
RNA assay results from multiple              For both presumptive and definitive              opportunistic infection in infants and
studies, the CDC has revised the case        exclusion of infection, the child               children with HIV infection is
definition for exclusion of HIV               should have no other laboratory (eg,            Pneumocystis jirovecii pneumonia
infection in infants for surveillance        no positive NAAT results) or clinical           (PCP). PCP incidence in untreated
purposes.56 The definitions supplied          (eg, no AIDS-defining conditions)                infants with HIV is highest during the
here are based on the CDC                    evidence of HIV infection. For infants          first year of life, with cases peaking at
surveillance definitions and are              who have been breastfed, a similar              3 to 6 months of age.58,59
appropriate for the management of            testing algorithm can be followed,              Chemoprophylaxis is highly effective
children born to women with HIV              with additional testing every                   in the prevention of PCP and should
infection. These definitions of               3 months during breastfeeding                   be administered to infants in whom
exclusion of HIV infection are only for      followed by monitoring at 4 to 6                HIV infection is diagnosed from 4 to

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6                                                                                                FROM THE AMERICAN ACADEMY OF PEDIATRICS
6 weeks of age until their first                 any other person in the family                   The 6-week ZDV regimen in infants
birthday. Thereafter, the need for              receives a diagnosis of acid-fast                can cause anemia, which largely
prophylaxis is based on age-specific             bacillus smear-positive TB, the infant           remains clinically insignificant and
CD41 T-lymphocyte counts and/or                 should be separated from that person             generally resolves after termination
percentages.60 Trimethoprim-                    until the TB infection has been                  of ZDV prophylaxis. If anemia persists
sulfamethoxazole is the most                    treated with anti-TB medications and             even after stopping the ZDV regimen,
common drug used for prophylaxis                a physician has determined that the              alternative etiologies are likely
because of its high efficacy, relative           person is no longer contagious. In the           responsible. Anemia can be severe in
safety, low cost, and broad                     event that a pregnant woman has                  infants taking ZDV who were born
antimicrobial spectrum60 (for                   documented TB that can be spread by              prematurely or with other medical
further discussion, see ref 60).                the hematogenous route, the infant               problems. Also, administration of ZDV
                                                should be evaluated for congenital TB            in combination with other
PCP prophylaxis is not recommended
                                                by a pediatric infectious disease                antiretroviral drugs can cause
for infants with presumptive lack of
                                                expert.                                          hematologic toxicity.68 The timing of
HIV infection (see previous section)
                                                                                                 monitoring of hematologic toxicity
but should be initiated for infants             Immunizations                                    from ZDV prophylaxis depends on
with indeterminate HIV infection
                                                Each year, the CDC publishes                     many factors such as baseline
status starting at 4 to 6 weeks of
                                                immunization schedules for children              hematologic values, gestational age at
age.60 Thus, for infants with negative
                                                and adolescents 0 to 18 years of age62           birth, clinical condition of the child,
HIV NAAT results at 2 and 4 to
                                                as well as for children with HIV                 receipt of concomitant medications,
6 weeks of age (presumptively not
                                                infection.63 All routine infant                  and maternal antepartum therapy.
infected with HIV), PCP prophylaxis
                                                immunizations should be given to                 Hemoglobin and neutrophil counts
can be avoided completely. For an
                                                infants exposed to HIV. If HIV                   should be measured in infants who
infant exposed to HIV with
                                                infection is confirmed in an infant               have taken ZDV- and/or lamivudine-
indeterminate HIV infection status
                                                exposed to HIV, then guidelines for              containing antiretroviral regimens for
who initiated prophylaxis at 4 to
                                                the child with HIV infection should be           4 or more weeks.
6 weeks of age and subsequently
                                                followed.62,63
meets criteria for presumptive or                                                                The decision of whether to
definitive lack of HIV infection, PCP            Monitoring for Toxicity From In Utero            discontinue antiretroviral prophylaxis
prophylaxis can be stopped.                     and Neonatal Antiretroviral Drug                 early because of identification of
                                                Exposure                                         hematologic abnormalities is made on
Prevention of Tuberculosis                                                                       the basis of factors such as severity of
                                                Monitoring for and Management of
Increased risk of tuberculosis (TB)             Short-term Toxicity During Infant                the laboratory abnormality,
among adults living with HIV                    Antiretroviral Prophylaxis                       associated clinical symptoms,
infection is well documented. Because                                                            duration of infant prophylaxis already
                                                Because exposure to maternal
infants and children with TB infection                                                           received, the magnitude of the risk of
                                                antiretroviral drugs taken during
and disease are usually infected by an                                                           HIV infection in the infant (as
                                                pregnancy can cause small but
adult with whom they live and have                                                               assessed by maternal receipt of ART,
                                                apparent variations of hemoglobin
daily contact, TB infection status                                                               maternal viral load near delivery, and
                                                and neutrophil counts, a baseline
information should be obtained about                                                             mode of delivery), and availability of
                                                complete blood cell and differential
the mother and all other household                                                               alternative interventions (eg, red
                                                count has been recommended for the
contacts of infants born to mothers                                                              blood cell transfusion) in consultation
                                                newborn infant.64 The risk of anemia
with HIV. Bacille Calmette-Guerin                                                                with a pediatric HIV specialist.
                                                and neutropenia is greater in infants
immunization is not recommended
                                                whose mothers received ART during                Routine measurement of serum
for infants born to women with HIV
                                                pregnancy, but mild anemia was also              lactate concentration in
infection in the United States and
                                                observed commonly in infants whose               asymptomatic neonates to screen for
should not be administered to infants
                                                mothers received ZDV monotherapy                 possible mitochondrial toxicity
and children with known HIV
                                                compared with infants whose                      related to ZDV prophylaxis is not
infection because of its potential to
                                                mothers received no antiretroviral               recommended because the clinical
cause disseminated disease.61
                                                drugs during pregnancy.65                        relevance of increased lactate
If an infant is exposed to anyone with          Nonetheless, the advantages of                   concentrations in the absence of
active TB, the infant should be                 maternal ART for prevention of                   symptoms is unknown, transient
evaluated for TB disease and                    perinatal transmission are far greater           elevations return to normal, and
managed according to published                  than hematologic toxicity in the                 there is poor predictive value for later
guidelines.61 If the infant’s mother or         newborn infant.66,67                             appearance of symptomatic

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PEDIATRICS Volume 146, number 5, November 2020                                                                                          7
toxicity.69,70 However, if severe           the siblings, should be tested because          include adherence to medications to
clinical symptoms, particularly             it is possible, albeit unusual, for             prevent perinatal transmission of HIV
neurologic symptoms, develop in the         perinatally infected children to                and prompt assessment of illness in
infant, a serum lactate concentration       remain asymptomatic into                        the infant exposed to HIV as well as
should be obtained. If the serum            adolescence.80,81                               the schedule of follow-up visits for
lactate concentration is significantly                                                       assessment and laboratory assays
elevated in an infant with compatible       Counseling and Support                          (both for diagnosis of HIV infection
clinical symptoms, a pediatric HIV          An HIV diagnosis can have                       and to check for any adverse effects
expert can help determine if                a significant impact on an individual            of antiretroviral exposure).
antiretroviral prophylaxis should be        and his or her family. When                     Breastfeeding is not recommended
terminated. In general, prophylaxis         counseling the mother of an infant              even if mothers are receiving ART for
should continue unless there is             exposed to HIV, exploring whether               their own HIV disease.37
a compelling reason to stop.                HIV infection was recently diagnosed            Counseling should include education
                                            in the mother during or after                   about the risks of HIV transmission,
Long-term Toxicity
                                            pregnancy and whether she needs                 including the lack of transmission risk
Research has not revealed significant        a referral for her own care may                 in family activities such as eating,
risk of neoplasia or organ-system           contribute to care of the whole family.         bathing, or sleeping together.
toxicities from in utero exposure to        Additionally, some families may                 Planning regarding future
ZDV or other antiretroviral drugs.71        require support related to an HIV-              reproductive plans for the family,
The issue of mitochondrial                  associated illness or death in other            likely in collaboration with the
dysfunction from the use of ART has         family members.                                 family’s adult HIV and gynecologic
been unsubstantiated69 but remains
                                            Increased need for social and                   and obstetric providers, can minimize
under investigation. However, in
                                            psychological support services may              the risk of HIV acquisition for sexual
children exposed to HIV with severe
                                            result from factors including                   partners and perinatal transmission
clinical symptoms, neurologic or
                                            economic hardship, substance use,               in future pregnancies.
cardiac in particular, mitochondrial
dysfunction is part of the differential     depression, social isolation, lack of
                                                                                            Confidentiality should be maintained
diagnosis in HIV infection.70,72–77         health care, unemployment, difficulty
                                                                                            at all times. In some cases, one or
                                            in finding housing, or domestic
Information regarding in utero and/                                                         more family members may not be
                                            violence. In addition, fear of loss of
or neonatal antiretroviral exposure is                                                      aware of the HIV infection status of
                                            existing supports and services, such
an important part of a permanent                                                            the mother, which warrants extra
                                            as loss of support from a partner or
record, particularly in uninfected                                                          caution in the labor and delivery unit
                                            loss of employment, insurance, or
children. Uninfected children                                                               and when discussing the postpartum
                                            health care coverage are important
                                                                                            management of the infant or in the
perinatally exposed to HIV have been        considerations.82–84 Particularly
found to have a higher rate of                                                              pediatric office when discussing care
                                            vulnerable are pregnant adolescents
childhood infections in the first year                                                       of the child.
                                            with HIV infection.85
of life than unexposed children and
benefit from regular medical care.78,79      Additional factors may be present for           HIV Exposure and Infection Status
Yearly follow-up into adulthood to          women who have emigrated from                   Reporting
monitor for long-term toxicity such         other countries, in particular factors
                                                                                            Name-based HIV reporting to state
as cancer or neurodevelopmental             related to culture and concerns about
                                                                                            health departments is required in all
or metabolic disorders is                   immigration status. This population
                                                                                            states and territories for surveillance
appropriate.71                              may have been subject to or know of
                                                                                            purposes.86 In addition, many states
                                            stigmatization and discrimination
                                                                                            require reporting pregnancy in
Testing Family Members                      against people with HIV infection. In
                                                                                            women living with HIV and the
                                            addition, distrust or
HIV screening should be                                                                     infection status of their infants. To
                                            misunderstanding of the US medical
recommended and offered to all                                                              facilitate the required reporting, even
                                            system may complicate care and
immediate family members with                                                               when reporting is delegated to
                                            follow-up of the infant.
unknown HIV infection status; this                                                          another party, the pediatrician should
should be performed with the                An outline of plans for medical care            collect the maternal antiretroviral
mother’s consent to include the             for the infant will help new parents,           treatment history, maternal
infant’s father and/or mother’s sexual      foster parents, or other caregivers             demographics, labor and delivery
partners. All siblings of the infant        optimally care for their infant                 record, and newborn records at the
exposed to HIV, regardless of age of        exposed to HIV. Important topics                time of birth.

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8                                                                                               FROM THE AMERICAN ACADEMY OF PEDIATRICS
SUMMARY (SEE TABLE 1)                                should be stopped and                            with no positive HIV virological
 1. Whenever possible, maternal HIV                  breastfeeding can be initiated.                  test results, presumptive
    infection should be identified                 4. Avoidance of breastfeeding has                   exclusion of HIV infection is
    before or during pregnancy,                      been and continues to be                         based on 2 negative HIV RNA or
    which allows earlier initiation of               a standard, strong                               DNA NAAT results from separate
    care for the woman and for more                  recommendation for women                         specimens, both of which were
    effective interventions to prevent               living with HIV in the United                    obtained at $2 weeks of age
    perinatal transmission. The AAP                  States because maternal ART                      and 1 of which was obtained
    recommends documented,                           dramatically reduces but                         at $4 weeks of age, 1 negative
    routine HIV testing for all                      does not eliminate breast                        HIV RNA or DNA NAAT result
    pregnant women in the United                     milk transmission, and safe                      obtained at $8 weeks of age,
    States after notifying the patient               infant feeding alternatives are                  or 1 negative HIV antibody test
    that testing will be performed,                                                                   result obtained at $6 months
                                                     readily available in the United
    unless the patient declines HIV                                                                   of age.
                                                     States.
    testing (opt-out consent or right                                                             9. Definitive exclusion of HIV
                                                  5. Pediatricians should provide
    of refusal). All HIV testing,                                                                    infection in a nonbreastfed infant
                                                     counseling to parents and
    including during the third                                                                       is based on 2 or more negative
                                                     caregivers of infants exposed to
    trimester, should be performed in                                                                HIV RNA or DNA test results,
                                                     HIV about HIV infection,
    a manner consistent with state                                                                   with 1 negative result at age
                                                     including routine care of the
    and local laws.                                                                                  $1 month and 1 negative result
                                                     infant, diagnostic tests, and
                                                                                                     at age $4 months, or 2 negative
 2. If the mother’s HIV serostatus is                potential drug toxicities.
                                                                                                     HIV antibody test results from
    unknown at the time of labor or               6. All infants exposed to HIV should               separate specimens obtained at
    birth, the newborn infant’s health               undergo virological testing with                age $6 months.
    care provider should perform                     HIV DNA, RNA, or total nucleic
    expedited HIV antibody testing                                                               10. Many experts confirm the
                                                     acid assays at 14 to 21 days of
    on the mother or the newborn                                                                     absence of HIV infection with
                                                     age. If results are negative, these
    infant or antigen/antibody                                                                       a negative HIV antibody assay
                                                     tests should be repeated at 1 to 2
    testing on the mother, with                                                                      result at 12 to 24 months of
                                                     and 4 to 6 months of age to                     age. These laboratory tests can
    appropriate consent consistent
                                                     identify or exclude HIV infection               only be used to exclude HIV
    with state and local laws. The
                                                     as early as possible. If any test               infection if there is no other
    results should be reported to
                                                     result is positive, the test should             laboratory or clinical evidence of
    health care providers quickly
                                                     be repeated immediately for                     HIV infection (ie, no subsequent
    enough to allow effective
                                                     confirmation.                                    positive results from NAATs
    antiretroviral prophylaxis to be
    administered to the infant as                 7. Initial testing in the first few days            if tests were performed and
    soon as possible after birth and                 of life allows identification of in              no AIDS-defining condition
    certainly within 6 to 12 hours                   utero infection and should be                   for which there is no other
    after birth.                                     considered if maternal                          underlying condition of
                                                     antiretroviral drugs were not                   immunosuppression) and the
 3. Intravenous ZDV for the mother
                                                     administered during pregnancy                   child is not receiving
    and presumptive HIV therapy for
                                                     or in other high-risk situations                antiretroviral drugs.
    the newborn infant should be
                                                     (see text). If an HIV NAAT for              11. PCP prophylaxis is not
    administered promptly on the
    basis of a positive rapid antibody               the newborn infant was not                      recommended for infants who
    or antigen/antibody test result                  performed shortly after birth,                  are presumptively or definitively
    without waiting for the results of               or if such test results were                    not infected with HIV (see
    supplemental HIV testing, and                    negative, diagnostic testing                    recommendations 9 and 10).
    breastfeeding should not be                      with an HIV NAAT is performed                   Infants with indeterminate
    initiated. If the rapid test result is           at 14 to 21 days of age                         HIV infection status after 6 weeks
    positive, supplemental testing                   because the diagnostic                          of age should receive prophylaxis
    should be performed, and if                      sensitivity of virological assays               until they are determined
    supplemental test results are                    increases rapidly by 2 weeks                    presumptively or definitively
    negative (indicating that the                    of age.                                         not to be infected with HIV.
    infant was not truly exposed to               8. For nonbreastfeeding infants and            12. All infants exposed to
    HIV), then antiretroviral drugs                  children younger than 18 months                 antiretroviral agents in utero or

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PEDIATRICS Volume 146, number 5, November 2020                                                                                           9
as newborn infants should be                 LEAD AUTHORS                                         George Siberry, MD, MPH, FAAP – United
       monitored for short- and long-                                                                    States Agency for International Development
                                                    Ellen Gould Chadwick, MD, FAAP
                                                                                                         (USAID)
       term drug toxicity.                          Echezona Edozie Ezeanolue, MD, MPH, FAAP
                                                                                                         Bill G. Kapogiannis, MD – Eunice Kennedy
13. Immunizations and TB screening                                                                       Shriver National Institute for Child Health and
    should be provided for infants                                                                       Human Development
                                                    COMMITTEE ON PEDIATRIC AIDS,
    exposed to HIV in accordance                    2018–2019
    with published guidelines. A                    Ellen Gould Chadwick, MD, FAAP,                      STAFF
    BCG vaccine should not be                       Chairperson
    administered to infants in whom                                                                      Anjie Emanuel, MPH
                                                    Echezona Edozie Ezeanolue, MD, MPH, FAAP
    HIV infection is diagnosed.                     Katherine Kai-Chi Hsu, MD, MPH, FAAP
                                                    Athena P. Kourtis, MD, PhD, MPH, FAAP
14. HIV testing should be offered and               Ayesha Mirza, MD, FAAP
    recommended to immediate                        Rosemary M. Olivero, MD, FAAP
    family members of infants                       Natella Yurievna Rakhmanina, MD,                       ABBREVIATIONS
    exposed to HIV.                                 PhD, FAAP
                                                    Carina Rodriguez, MD, FAAP                             AAP: American Academy of
15. The practitioner providing care                                                                             Pediatrics
    for an infant with HIV infection                                                                       ART: antiretroviral therapy
    should consult with a pediatric                 PREVIOUS COMMITTEE ON PEDIATRIC AIDS                   CDC: Centers for Disease Control
    HIV specialist. An alternative                  MEMBER                                                      and Prevention
    service for advice on prevention                Elizabeth Montgomery Collins, MD,                      HHS: US Department of Health and
    of perinatal HIV transmission or                MPH, FAAP                                                   Human Services
    HIV management is the National                                                                         NAAT: nucleic acid
    Clinician Consultation Center                   CONSULTANT                                                    amplification test
    (https://nccc.ucsf.edu/clinician-                                                                      PCP: Pneumocystis jirovecii
                                                    Athena P. Kourtis, MD, PhD, MPH, FAAP
    consultation/perinatal-hiv-aids/).                                                                          pneumonia
    If the infant’s mother is an                                                                           PCR: polymerase chain reaction
    adolescent, consultation with                   LIAISONS                                               TB: tuberculosis
    a practitioner familiar with the                Steve Nesheim, MD – Centers for Disease                ZDV: zidovudine
    care of adolescents is advised.                 Control and Prevention

FINANCIAL DISCLOSURE: Dr Chadwick disclosed a financial relationship in which her spouse owns stock in pharmaceutical companies that manufacture drugs
used to treat HIV/AIDS; and Dr Ezeanolue has indicated he has no financial relationships relevant to this article to disclose.
FUNDING: No external funding.
POTENTIAL CONFLICT OF INTEREST: Dr Chadwick disclosed a financial relationship in which her spouse owns stock in pharmaceutical companies that manufacture
drugs used to treat HIV/AIDS; and Dr Ezeanolue has indicated he has no potential conflicts of interest to disclose.

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PEDIATRICS Volume 146, number 5, November 2020                                                                                                  11
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