Recommendations for Prevention and Control of Influenza in Children, 2011-2012 - Pediatrics

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Recommendations for Prevention and Control of Influenza in Children, 2011-2012 - Pediatrics
FROM THE AMERICAN ACADEMY OF PEDIATRICS
                                                                                           Organizational Principles to Guide and Define the Child
                                                                                     Health Care System and/or Improve the Health of all Children

POLICY STATEMENT

Recommendations for Prevention and Control of
Influenza in Children, 2011–2012
COMMITTEE ON INFECTIOUS DISEASES
KEY WORDS                                                          abstract
influenza, immunization, live-attenuated influenza vaccine,
trivalent inactivated influenza vaccine, vaccine, children,
                                                                   The purpose of this statement is to update recommendations for rou-
pediatrics                                                         tine use of trivalent seasonal influenza vaccine and antiviral medica-
ABBREVIATIONS                                                      tions for the prevention and treatment of influenza in children. The key
AAP—American Academy of Pediatrics                                 points for the upcoming 2011–2012 season are that (1) the influenza
HCP—health care personnel                                          vaccine composition for the 2011–2012 season is unchanged from the
CDC—Centers for Disease Control and Prevention
TIV—trivalent inactivated influenza vaccine                         2010 –2011 season, (2) annual universal influenza immunization is in-
LAIV—live-attenuated influenza vaccine                              dicated, (3) a simplified dosing algorithm for administration of influ-
This document is copyrighted and is property of the American       enza vaccine to children 6 months through 8 years of age has been
Academy of Pediatrics and its Board of Directors. All authors      created, (4) most children presumed to have egg allergy can safely
have filed conflict of interest statements with the American
Academy of Pediatrics. Any conflicts have been resolved through
                                                                   receive influenza vaccine in the office without need for an allergy con-
a process approved by the Board of Directors. The American         sultation, and (5) an intradermal trivalent inactivated influenza vaccine
Academy of Pediatrics has neither solicited nor accepted any       has been licensed for the 2011–2012 season for use in people 18
commercial involvement in the development of the content of
                                                                   through 64 years of age. Pediatricians, nurses, and all health care
this publication.
                                                                   personnel have leadership roles in the prevention of influenza through
                                                                   vaccine use and public education. In addition, pediatricians should
                                                                   promptly identify influenza infections to enable rapid treatment, when
                                                                   indicated, to reduce childhood morbidity and mortality. Pediatrics
                                                                   2011;128:000

                                                                   INTRODUCTION
                                                                   The American Academy of Pediatrics (AAP) recommends annual triva-
                                                                   lent seasonal influenza immunization for all children and adolescents 6
                                                                   months of age and older during the 2011–2012 influenza season. Spe-
www.pediatrics.org/cgi/doi/10.1542/peds.2011-2295
                                                                   cial outreach efforts should be made to vaccinate people in the follow-
doi:10.1542/peds.2011-2295
                                                                   ing groups:
All policy statements from the American Academy of Pediatrics
automatically expire 5 years after publication unless reaffirmed,   ● All children, including infants born prematurely, 6 months of age
revised, or retired at or before that time.                           and older with conditions that increase the risk of complications
PEDIATRICS (ISSN Numbers: Print, 0031-4005; Online, 1098-4275).       from influenza.
Copyright © 2011 by the American Academy of Pediatrics             ● All household contacts and out-of-home care providers of
                                                                      ● children with high-risk conditions and
                                                                      ● children younger than 5 years.
                                                                   ● All health care personnel (HCP).
                                                                   ● All women who are pregnant, considering pregnancy, or breastfeed-
                                                                      ing during the influenza season.

                                                                   KEY POINTS RELEVANT FOR THE 2011–2012 INFLUENZA SEASON
                                                                    1. All people 6 months of age and older should receive trivalent sea-
                                                                       sonal influenza vaccine each year, especially those who are at high

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Recommendations for Prevention and Control of Influenza in Children, 2011-2012 - Pediatrics
risk of influenza complications                 immunization status to the pri-                  demic period, at least 114
       (eg, children with chronic medical             mary care provider. Immunization                 laboratory-confirmed influenza-
       conditions such as asthma, diabe-              of close contacts of children at                 associated pediatric deaths were
       tes mellitus, immunosuppression,               high risk of influenza-related com-               recorded during the 2010 –2011
       or neurologic disorders). In the               plications is intended to reduce                 season. Seventy-one deaths were
       United States, more than two-                  their risk of contagion (ie, “co-                associated with influenza A virus
       thirds of children younger than 6              cooning”). The concept of cocoon-                subtypes: 30 influenza A (2009
       years and almost all children                  ing is particularly important for                H1N1), 21 influenza A (H3N2), and
       older than 6 years spend signifi-               helping to protect infants younger               20 undetermined subtypes. Forty-
       cant time in child care and school             than 6 months, because they are                  three deaths were associated with
       settings outside the home. Expo-               too young to be immunized with                   influenza B viruses. More than half
       sure to groups of children in-                 influenza vaccine. The risk of                    of all hospitalized pediatric pa-
       creases the risk of infectious dis-            influenza-associated hospitaliza-                 tients (51.8%) did not have any
       eases. Children younger than 2                 tion in healthy children younger                 known underlying conditions (Fig
       years are at an increased risk of              than 24 months has been shown to                 1). Although children with certain
       hospitalization and complications              be greater than the risk of hospi-               conditions are at higher risk of
       attributable to influenza. School-              talization in previously recognized              complications, substantial pro-
       aged children bear a large influ-               high-risk groups such as the el-                 portions of seasonal influenza
       enza disease burden and have a                 derly. Children 24 through 59                    morbidity and mortality occur
       significantly higher chance of                  months of age have had increased                 among healthy children.
       seeking influenza-related medical               rates of outpatient visits and anti-         5. The recommended trivalent vaccine
       care compared with healthy                     microbial use.                                  for the 2011–2012 influenza season
       adults. Therefore, reducing influ-           3. The 2009 pandemic influenza A                    contains the following 3 virus strains:
       enza transmission among chil-                  (H1N1) virus emerged in March                    ●   A/California/7/2009 (H1N1)–like
       dren who attend child care or                  2009 and was associated with 2                       antigen (derived from 2009 pan-
       school should decrease the bur-                significant waves of influenza ac-                     demic influenza A [H1N1] virus);
       den of childhood influenza and                  tivity during 2009 and 2010, as de-              ●   A/Perth/16/2009     (H3N2)–like
       transmission of influenza to                    fined by the World Health Organi-                     antigen; and
       household contacts and commu-                  zation.     This    virus    strain
                                                                                                       ●   B/Brisbane/60/2008–like antigen.
       nity members. Most egg-allergic                disproportionately affected the
       children can now receive influ-                 pediatric population compared                6. On the basis of ongoing global
       enza vaccine safely.                           with the usual seasonal influenza                surveillance data, for only the
                                                      strains. It was 1 of 3 circulating              fourth time in 25 years there is
    2. Annual trivalent seasonal influ-
                                                      influenza viruses during the                     no need to change any of the in-
       enza vaccine is recommended for
                                                      2010 –2011 influenza season, and                 fluenza vaccine strains (Fig 2).
       household members and out-of-
                                                      it is expected to circulate again               The number of trivalent seasonal
       home care providers of children
                                                      during the 2011–2012 influenza                   influenza vaccine doses to be ad-
       and adolescents at high risk of
                                                      season in combination with 1 or                 ministered this year depends on the
       complications of influenza and
                                                      more of the other seasonal influ-                child’s age at the time of the first
       healthy children younger than 5
                                                      enza strains. During the 2010 –                 administered dose and his or her
       years, especially infants younger
                                                      2011 season, influenza A (H3N2)                  vaccine history (Fig 3):
       than 6 months. Pediatric offices
                                                      was the predominant circulating                  ●   Infants younger than 6 months
       should consider serving as an al-
       ternate venue for parents and                  strain, but weekly virus subtype                     are too young to be immunized
       other adults who care for children             activity varied regionally.                          with influenza vaccine.
       to receive influenza vaccine, if this        4. Although the number of hospital-                 ●   Children 9 years of age and
       approach is acceptable to both the             izations for younger persons and                     older need only 1 dose.
       pediatrician and the adult to be               outpatient visits for influenza-like              ●   Children 6 months through 8
       immunized. Clinicians should still             illness overall was lower during                     years of age should receive 2
       encourage adults to have a medi-               the 2010 –2011 season compared                       doses of vaccine if they did not
       cal home and communicate their                 with the influenza A (H1N1) pan-                      receive any dose of vaccine last

2      FROM THE AMERICAN ACADEMY OF PEDIATRICS
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Recommendations for Prevention and Control of Influenza in Children, 2011-2012 - Pediatrics
FROM THE AMERICAN ACADEMY OF PEDIATRICS

FIGURE 1
Selected underlying medical conditions in patients hospitalized with influenza, FluSurv-NET 2010 –2011. Reprinted from: Centers for Disease Control and
Prevention. FluView 2010 –2011 influenza season week 15 ending April 16, 2010. Available at: www.cdc.gov/flu/weekly.

                         H1N1-like strain         H3N2-like strain          B-like strain
        1986-'87         A/Chile/1/83 and        A/Christchurch/4/85-     B/Ann Arbor/1/86                     seasonal influenza vaccine last
                         A/Singapore/6/86         A/Mississippi/1/85                                           season need only 1 dose of the
        1987-'88         A/Singapore/6/86       A/Leningrad/360/1986       B/Ann Arbor/1/86
        1988-'89         A/Singapore/6/86           A/Sichuan/2/87          B/Beijing/1/87                     2011–2012 influenza vaccine this
        1989-'90         A/Singapore/6/86         A/Shanghai/11/87        B/Yamagata/16/88
        1990-'91         A/Singapore/6/86          A/Guizhou/54/89        B/Yamagata/16/88
                                                                                                               season.
        1991-'92         A/Singapore/6/86          A/Beijing/353/89       B/Yamagata/16/88
        1992-'93a        A/Singapore/6/86         A/Beijing/353/89        B/Yamagata/16/88
                                                                                                       In most influenza seasons, children
        1993-'94         A/Singapore/6/86           A/Beijing/32/92        B/Panama/45/90              who received influenza vaccine for the
        1994-'95         A/Singapore/6/86         A/Shangdong/9/93         B/Panama/45/90
        1995-'96         A/Singapore/6/86       A/Johannesburg/33/94       B/Beijing/184/93            first time the previous season but who
        1996-'97         A/Singapore/6/86         A/Wuhan/359/95           B/Beijing/184/93            received only 1 dose are recom-
        1997-'98          A/Bayern/7/95           A/Wuhan/359/95           B/Beijing/184/93
        1998-'99         A/Beijing/262/95           A/Sydney/5/97          B/Beijing/184/93            mended to receive 2 doses of vaccine
        1999-2000a       A/Beijing/262/95           A/Sydney/5/97          B/Beijing/184/93
        2000-'01      A/New Caledonia/20/99       A/Moscow/10/99           B/Beijing/184/93            in the current season, because the
        2001-'02      A/New Caledonia/20/99       A/Moscow/10/99           B/Sichuan/379/99            first vaccine dose primes the immune
        2002-'03      A/New Caledonia/20/99       A/Moscow/10/99        B/Hong Kong/330/2001
        2003-'04a     A/New Caledonia/20/99       A/Moscow/10/99        B/Hong Kong/330/2001           system, but no significant protection
        2004-'05      A/New Caledonia/20/99       A/Fujian/411/2002      B/Shanghai/361/2002
        2005-'06      A/New Caledonia/20/99      A/California/7/2004     B/Shanghai/361/2002
                                                                                                       against disease is achieved until 1
        2006-'07      A/New Caledonia/20/99     A/Wisconsin/67/2005     B/Malaysia/2506/2004           week after the second dose. How-
        2007-'08     A/Solomon Islands/3/2006   A/Wisconsin/67/2005     B/Malaysia/2506/2004
        2008-'09        A/Brisbane/59/2007       A/Brisbane/10/2007        B/Florida/4/2006            ever, because the vaccine strains for
        2009-'10        A/Brisbane/59/2007       A/Brisbane/10/2007       B/Brisbane/60/2008           the 2011–2012 season are un-
        Pandemic       A/California/07/2009
        2010-'11       A/California/07/2009       A/Perth/16/2009        B/Brisbane/60/2008            changed from last season, 1 dose
        2011-'12a      A/California/07/2009       A/Perth/16/2009        B/Brisbane/60/2008
                                                                                                       this season coupled with the 1 dose
FIGURE 2                                                                                               of last season will provide adequate
World Health Organization vaccine composition recommendations 1986 to present. a No change in
influenza vaccine strains from previous influenza season. Data source: World Health Organization,        protection (Fig 4). Previous recom-
Global Alert and Response. Recommendations for influenza vaccine composition. Available at: www.        mendations for 2 doses of vaccine will
who.int/csr/disease/influenza/vaccinerecommendations1/en/index.html (for data from 1998 to pres-
ent; previous years’ data were obtained from Weekly Epidemiologic Record).                             resume for seasons in which 1 or more
                                                                                                       of the vaccine strains change.
        season. The second dose should                    ●   Children 6 months through 8                7. Optimal protection is achieved
        be administered at least 4                            years of age who received at least            through annual immunization. An-
        weeks after the first dose.                            1 dose of the 2010 –2011 trivalent            tibody titers wane to 50% of their

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Recommendations for Prevention and Control of Influenza in Children, 2011-2012 - Pediatrics
date. Protective immune responses
                                                                                                                  persist throughout the influenza
                                                                                                                  season, which can have ⬎1 dis-
                                                                                                                  ease peak and often extends into
                                                                                                                  March or later. Prompt initiation
                                                                                                                  of influenza immunization and
                                                                                                                  continuance of immunization
                                                                                                                  throughout the influenza season,
                                                                                                                  regardless of whether influenza is
                                                                                                                  circulating (or has circulated) in
                                                                                                                  the community, are critical com-
                                                                                                                  ponents of an effective immuniza-
FIGURE 3                                                                                                          tion strategy. This approach pro-
Number of 2011–2012 seasonal influenza vaccine doses for children 6 months through 8 years of age.                 vides ample opportunity to
● This simplified approach is only possible because the 2011–2012 influenza vaccine contains the
                                                                                                                  administer a second dose of vac-
  identical 3 influenza virus strains used last year in the 2010 –2011 vaccine.
● The number of doses to be given is determined on the basis of the child’s age at the time of the first dose.
                                                                                                                  cine, because children younger than
                                                                                                                  9 years might require 2 doses to
                                                                                                                  confer optimal protection.
                                                                                                                9. HCP, influenza campaign organiz-
                                                                                                                   ers, and public health agencies
                                                                                                                   should collaborate to develop im-
                                                                                                                   proved strategies for planning,
                                                                                                                   communication, and administra-
                                                                                                                   tion of vaccines.
                                                                                                                  ●   Plan to make trivalent seasonal
                                                                                                                      influenza vaccine easily acces-
                                                                                                                      sible for all children. Examples
                                                                                                                      of such action include creating
                                                                                                                      walk-in influenza clinics, ex-
                                                                                                                      tending office hours beyond
                                                                                                                      routine times during peak vac-
                                                                                                                      cination periods, considering
FIGURE 4                                                                                                              how to immunize parents and
Percentage of children with titers greater than 1:32 during seasons with no change in vaccine antigen.                adult caregivers at the same
* One dose administered in the spring; the second dose administered in the fall. ** Two doses
administered 4 weeks apart in the fall. (Reprinted with permission from Englund JA, Fairchok MP,                      time in the same office setting
Monto AS, Neuzil KM. Pediatrics. 2005;115[4]:1039 –1047.)                                                             as children, and working with
                                                                                                                      other institutions (eg, schools,
                                                                                                                      child care centers, and reli-
       original levels 6 to 12 months after                    ents and caregivers, and begin                         gious organizations) or alterna-
       vaccination. Because the vaccine                        immunization of all children 6                         tive care sites, such as emer-
       strains for the 2011–2012 season                        months of age and older, espe-                         gency departments, to expand
       are unchanged from last season, a                       cially children at high risk of                        venues for administering vac-
       repeat dose this season is critical                     complications from influenza.                           cine while providing appropri-
       for maintaining protection in all                       HCP endorsement plays a major                          ate documentation of immuni-
       populations.                                            role in vaccine uptake. A strong                       zation for the child’s medical
    8. As soon as the trivalent seasonal                       correlation exists between HCP                         home.
       influenza vaccine is available lo-                       endorsement of influenza vac-                       ●   Concerted efforts among the
       cally, health care personnel                            cine and patient acceptance. Pro-                      aforementioned groups, plus vac-
       (HCP) should be immunized, pub-                         viders should continue to offer vac-                   cine manufacturers, distributors,
       licize vaccine availability to par-                     cine through the vaccine expiration                    and payers, are also necessary to

4      FROM THE AMERICAN ACADEMY OF PEDIATRICS
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FROM THE AMERICAN ACADEMY OF PEDIATRICS

TABLE 1 Antiviral Drug Sensitivities of Influenza Strains Expected to Circulate During the 2011–                            ommended for children 6 months of
            2012 Influenza Season
                                                                                                                           age and older and adults, including
   Seasonal Influenza Vaccine                  Amantadine (Symmetrela)/               Oseltamivir           Zanamivir
                                                                                                                           people with and without chronic med-
      Strain (2011–2012)                      Rimantadine (Flumadineb)                (Tamifluc)            (Relenzad)
                                                                                                                           ical conditions. The most common ad-
Seasonal influenza A (H1N1) virus                        Resistant                    Susceptible          Susceptible
  (derived from 2009 pandemic                                                                                              verse events after administration are
  influenza A [H1N1] virus)                                                                                                 local injection-site pain and tender-
Seasonal influenza A (H3N2) virus                        Resistant                    Susceptible          Susceptible      ness. Fever might occur within 24
Seasonal influenza B virus                               Resistant                    Susceptible          Susceptible
For current recommendations about treatment and chemoprophylaxis of influenza, see www.cdc.gov/flu/professionals/
                                                                                                                           hours after immunization in approxi-
antivirals/index.htm or www.aapredbook.org/flu. Circulating strains in local communities may vary from those found in the   mately 10% to 35% of children younger
vaccine; antiviral sensitivities of these strains are reported weekly at www.cdc.gov/flu/weekly/summary.htm.                than 2 years but rarely in older chil-
a Endo Pharmaceuticals (Chads Ford, PA).

b Forest Pharmaceuticals (St Louis, MO).                                                                                   dren and adults. Mild systemic symp-
c Roche Laboratories (Nutley, NJ).

d GlaxoSmithKline (Research Triangle Park, NC).
                                                                                                                           toms such as nausea, lethargy, head-
                                                                                                                           ache, muscle aches, and chills might
                                                                                                                           occur after administration of TIV.
          appropriately prioritize distribu-                         Control and Prevention (CDC) Web                      An intradermal formulation of TIV has
          tion to the primary care office set-                        site (www.cdc.gov/flu/index.htm).                      been licensed for the 2011–2012 sea-
          ting, especially when vaccine sup-                   11. As the 2011–2012 influenza sea-                          son for use in people 18 through 64
          plies are delayed or limited.                            son unfolds, it is critically impor-                    years of age. This method of delivery
      ●   Vaccine safety, effectiveness,                           tant for HCP to be aware of new                         involves a microinjection with a needle
          and indications must be com-                             or changing recommendations                             90% shorter than needles used for in-
          municated properly to the pub-                           from the CDC or their local and state                   tramuscular administration. The most
          lic. HCP should act as role mod-                         health departments. Up-to-date infor-                   common adverse events are redness,
          els by receiving influenza                                mation can be found on the AAP                          induration, swelling, pain, and itching
          immunization annually and rec-                           Web site (www.aap.org or http://                        at the site of administration at a
          ommending annual immuniza-                               aapredbook.aappublications.org/flu),                     slightly higher rate than occurs with
          tions to both their colleagues                           through state-specific AAP chapter                       the intramuscular formulation of TIV.
          and patients.                                            Web sites, or on the CDC Web site                       Headache, myalgia, and malaise might
                                                                   (www.cdc.gov/flu/index.htm).                             occur and tend to occur at the same
10. The neuraminidase inhibitors os-
                                                                                                                           rate as that with the intramuscular
    eltamivir (Tamiflu [Roche Labora-
                                                               TRIVALENT SEASONAL INFLUENZA                                formulation of TIV. There is no prefer-
    tories, Nutley, NJ]) and zanamivir
                                                               VACCINES                                                    ence for intramuscular or intradermal
    (Relenza [GlaxoSmithKline, Re-
                                                               Tables 2 and 3 summarize information                        immunization in people 18 years of age
    search Triangle Park, NC]) are the
                                                               on the 2 types of 2011–2012 trivalent                       or older; therefore, pediatricians may
    only antiviral medications rou-
    tinely recommended for chemo-                              seasonal influenza vaccines licensed                         choose to use either the intramuscular
    prophylaxis or treatment during                            for immunization of children and                            or intradermal product in their late ad-
    the 2011–2012 season. All strains                          adults: injectable trivalent inactivated                    olescent and young adult patients.
    of influenza currently anticipated                          influenza vaccine (TIV) and intrana-                         Increased reports of febrile seizures in
    to circulate are susceptible to                            sally administered live-attenuated in-                      the United States were noted by the
    neuraminidase inhibitors but have                          fluenza vaccine (LAIV). Both vaccines                        Vaccine Adverse Event Reporting Sys-
    high rates of resistance to aman-                          contain the identical strains of influ-                      tem (VAERS) and were associated with
    tadine and rimantadine (Table 1).                          enza A subtypes (ie, H1N1 and H3N2)                         TIV manufactured by Sanofi Pasteur
    Resistance characteristics might                           and influenza B anticipated to circulate                     (Fluzone), mainly in children in the 12-
    change rapidly; clinicians should                          during the 2011–2012 influenza                               through 23-month age group (the peak
    verify susceptibility information at                       season.                                                     age for febrile seizures), and included
    the start of the influenza season and                       TIV is an inactivated vaccine that con-                     some who concurrently had received
    monitor it during the season                               tains no live virus and cannot produce                      13-valent pneumococcal conjugate
    through either the AAP Web                                 a viral infection. TIV formulations are                     vaccine (PCV13). All children fully re-
    site (www.aap.org or http://                               now available for intramuscular and                         covered. On the basis of current data,
    aapredbook.aappublications.org/                            intradermal use. The intramuscular                          prophylactic use of antipyretic agents
    flu) or the Centers for Disease                             formulation of TIV is licensed and rec-                     in TIV-immunized children is not indi-

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TABLE 2 Recommended Trivalent Seasonal Influenza Vaccines for Different Age Groups: United States, 2011–2012 Influenza Season
     Vaccine             Trade Name                          Manufacturer                           Presentation             Ovalbumin Content,        Thimerosal Mercury           Age
                                                                                                                              ␮g of Ovalbumin           Content, ␮g of Hg          Group
                                                                                                                              per 0.5-mL Dose            per 0.5-mL Dose
Inactivated
   TIV               Fluzone                   Sanofi Pasteur, Swiftwater, PA                 0.25-mL prefilled syringe               ⬃0.1a                         0.0             6–35 mo
                                                                                             0.5-mL prefilled syringe                ⬃0.1a                         0.0             ⱖ36 mo
                                                                                             0.5-mL vial                            ⬃0.1a                         0.0             ⱖ36 mo
                                                                                             5.0-mL multidose vial                  ⬃0.1a                        25.0              ⱖ6 mo
    TIV              Fluzone intradermal       Sanofi Pasteur, Swiftwater, PA                 0.1-mL prefilled                       Not cited                      0.0             18–64 y
                                                                                                microinjection
    TIV              Fluzone HD                Sanofi Pasteur, Swiftwater, PA                 0.5-mL prefilled syringe                ⬃0.1a                        0.0               ⱖ65 y
    TIV              Fluvirin                  Novartis, East Hanover, NJ                    0.5-mL prefilled syringe                ⱕ1.0b                      ⬍1.0                 ⱖ4 y
                                                                                             5.0-mL multidose vial                  ⱕ1.0b                      25                   ⱖ4 y
    TIV              Fluarix                   GlaxoSmithKline, King of Prussia, PA          0.5-mL prefilled syringe                ⱕ0.05b                       0.0                ⱖ3 y
    TIV              FluLaval                  GlaxoSmithKline, King of Prussia, PA          5.0-mL multidose vial                  ⱕ1.0b                      25.0                ⱖ18 y
    TIV              Afluria                    CSL Biotherapies, King of Prussia, PA         0.5-mL prefilled syringe                ⱕ1.0b                       0                   ⱖ9c
                                                                                             5-mL multidose vial                    ⱕ1.0b                      25.0                 ⱖ9c
Live-attenuated
   LAIV              FluMist                   MedImmune, Gaithersburg, MD                   0.2-mL sprayer                        Not cited                      0.0              2–49 y
a Data obtained from Sanofi Pasteur (personal communication, 2011) suggests that the residual egg protein (expressed as ovalbumin) in Fluzone vaccine or in Fluzone High-Dose vaccine is
typically on the order of 0.1 ␮g per dose.
b Data are from the package inserts, many of which have been updated for the 2011–2012 season.

Data sources: American Academy of Pediatrics, Committee on Infectious Diseases. Pediatrics. 2010;126(4):816 – 826; Centers for Disease Control and Prevention. MMWR Recomm Rep.
2010;59(RR-8):1– 62; and Centers for Disease Control and Prevention. Morb Mortal Wkly Rep. 2011;60 (Early Release):1– 6.
c Age indication per package insert is ⱖ5 years; however, the ACIP recommends Afluria not be used in children aged 6 months through 8 years because of increased reports of febrile

reactions noted in this age group. If no other age-appropriate, licensed inactivated seasonal influenza vaccine is available for a child aged 5 through 8 years of age who has a medical
condition that increases the child’s risk for influenza complications, Afluria can be used; however, providers should discuss with the parents or caregivers the benefits and risks of influenza
vaccination with Afluria before administering this vaccine.

cated, and current AAP and Advisory                             and Drug Administration for healthy                              tions using several different clinical
Committee on Immunization Practices                             people 2 through 49 years of age. It is                          end points. In 1 study that compared
(ACIP) recommendations for adminis-                             not recommended for people with a                                LAIV with TIV in infants and young
tration of TIV in this age group are un-                        history of asthma or other high-risk                             children without severe asthma or a
changed. Febrile seizures can occur                             medical conditions associated with                               recent history of wheezing, LAIV
anytime a child has a fever, but the typ-                       an increased risk of complications                               showed significantly better efficacy
ical child who has a febrile seizure re-                        from influenza (see “Contraindica-                                than TIV; results of other studies sug-
covers quickly and fully.                                       tions and Precautions”). LAIV has the                            gest that TIV might be more effective
Previous febrile seizures or seizure                            potential to produce mild symptoms                               in young adults.
disorders are not a contraindication                            including rhinitis, headache, wheez-                             A large body of evidence demonstrates
to use of TIV or LAIV in otherwise eli-                         ing, vomiting, muscle aches, and fe-                             that thimerosal-containing vaccines
gible children. Use of antipyretic                              ver. LAIV should not be administered                             are not associated with increased risk
agents in febrile children does not                             to people with copious nasal conges-                             of autism spectrum disorders in chil-
reduce the incidence of febrile sei-                            tion that would impede vaccine                                   dren. However, some people might
zures; therefore, routine use of anti-                          delivery.                                                        raise concerns about the minute
pyretic agents for avoiding febrile                             Both TIV and LAIV are cost-effective                             amounts of thimerosal in TIV vaccines,
seizures in children who receive in-                            strategies for preventing influenza                               and in some states, there is a legis-
fluenza vaccine is not recommended.                              among children and their families                                lated restriction on the use of
Approximately 2% to 5% of children 6                            when circulating and vaccine strains                             thimerosal-containing vaccines for in-
months through 5 years of age will                              are matched closely, but efficacy var-                            fants and/or children. The benefits of
have at least 1 febrile seizure not as-                         ies according to the age of the recipi-                          protecting children against the known
sociated with vaccines in their                                 ent. Current data from direct compar-                            risks of influenza are clear. Therefore,
lifetime.                                                       isons of the efficacy or effectiveness                            children should receive any available
LAIV is a live-attenuated influenza                              of these 2 vaccines are limited, be-                             formulation of TIV rather than delay
vaccine that is administered intrana-                           cause the studies were conducted in                              immunization while waiting for vaccines
sally and is licensed by the US Food                            a variety of settings and in popula-                             with reduced thimerosal content or for

6         FROM THE AMERICAN ACADEMY OF PEDIATRICS
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FROM THE AMERICAN ACADEMY OF PEDIATRICS

TABLE 3 LAIV Compared With TIV                                                                                                   cine administration to people with egg
           Vaccine Characteristic                                  LAIV                                   TIV                    allergy can happen without the need
Route of administration                                Intranasal spray                   Intramuscular or intradermal           for referral. Data indicate that only ap-
                                                                                             injectiona                          proximately 1% of children have immu-
Type of vaccine                                        Live virus                         Killed virus
Product                                                Attenuated,                        Inactivated subvirion or               noglobulin E–mediated sensitivity to
                                                          cold-adapted                       surface antigen                     egg, and of those, a very small minority
No. of included virus strains                          3 (2 influenza A, 1                 3 (2 influenza A, 1 influenza B)         have a severe allergy.
                                                          influenza B)
Vaccine virus strains updated                          Annually                           Annually                               Standard immunization practice
Frequency of administrationb                           Annually                           Annually                               should include the ability to respond
Approved age groups                                    All healthy persons aged           All persons aged ⱖ6 mo
                                                                                                                                 to acute hypersensitivity reactions.
                                                          2–49 y                             (intradermal 18–64 y)
Interval between 2 doses in children                   4 wk                               4 wk                                   Therefore, influenza vaccine should be
Can be given to persons with medical risk              No                                 Yes                                    given to people with egg allergy with
    factors for influenza-related                                                                                                 the following preconditions (Fig 5):
    complications
Can be given to children with asthma or                Noc                                Yes                                    ● Appropriate resuscitative equip-
    children aged 2–4 y with wheezing in                                                                                           ment must be readily available.1
    the previous year
Can be simultaneously administered with                Yesd                               Yesd                                   ● Ovalbumin content up to 0.7 micro-
    other vaccines                                                                                                                 grams/0.5 mL per vaccine dose
If not simultaneously administered, can                No, prudent to space 4             Yes
                                                                                                                                   has been well tolerated (Table 2).
    be administered within 4 wk of another               wk apart
    live vaccine                                                                                                                 ● After immunization, the vaccine re-
Can be administered within 4 wk of an                  Yes                                Yes                                      cipient should be observed in the of-
    inactivated vaccine
a
                                                                                                                                   fice for 30 minutes, the standard
  The preferred site of TIV intramuscular injection for infants and young children is the anterolateral aspect of the thigh.
b See Fig 4 for decision algorithm to determine the number of doses of 2011–2012 seasonal influenza vaccine recommended             observation time after receiving
for children this year.                                                                                                            immunotherapy.
c LAIV is not recommended for children with a history of asthma. In the 2- through 4-year age group, there are children who

have a history of wheezing with respiratory illnesses in whom reactive airways disease is diagnosed and in whom asthma           ● For children who need a second dose,
may later be diagnosed. Therefore, because of the potential for increased wheezing after immunization, children 2 through
4 years of age with recurrent wheezing or a wheezing episode in the previous 12 months should not receive LAIV. When
                                                                                                                                   the same product brand is preferred, if
offering LAIV to children in this age group, a clinician should screen those who might be at higher risk of asthma by asking       possible, but it does not need to be from
the parents/guardians of 2-, 3-, and 4-year-olds (24- to 59-month-olds) the question, “In the previous 12 months, has a health
                                                                                                                                   the same lot as the first dose.
care professional ever told you that your child had wheezing?” If the parents answer “yes” to this question, LAIV is not
recommended for these children.
d LAIV coadministration has been evaluated systematically only among children 12 to 15 months of age with measles-
                                                                                                                                 VACCINE STORAGE AND
mumps-rubella and varicella vaccines. TIV coadministration has been evaluated systematically only among adults with
pneumococcal polysaccharide and zoster vaccines.
                                                                                                                                 ADMINISTRATION
Data sources: American Academy of Pediatrics, Committee on Infectious Diseases. Pediatrics. 2010;126(4):816 – 826; and
Fiore AE, Fry A, Shay D, Gubareva L, Bresee JS, Uyeki TM; Centers for Disease Control and Prevention. MMWR Recomm Rep.           Intramuscular Vaccine
2011;60(RR-1):1–24.
                                                                                                                                 The intramuscular formulation of TIV is
                                                                                                                                 shipped and stored at 2°C to 8°C (35°F–
thimerosal-free vaccine. Although some                            have egg allergy. More conservative                            46°F). It is administered intramuscu-
formulations of TIV contain only a trace                          approaches, such as skin testing or a                          larly into the anterolateral thigh of in-
amount of thimerosal, certain types can                           2-step graded challenge, are no longer                         fants and young children and into the
be obtained with no thimerosal. LAIV                              recommended.                                                   deltoid muscle of older children and
does not contain thimerosal. Vaccine                                                                                             adults. The volume of vaccine is age
                                                                  As a precaution, clinicians should de-                         dependent; infants and toddlers older
manufacturers are delivering increas-
ing amounts of thimerosal-free influenza                           termine if the presumed egg allergy is                         than 6 months but younger than 36
vaccine each year.                                                based on a mild or severe reaction.                            months should receive a dose of 0.25
                                                                  Mild reactions are defined as hives                             mL, and all people aged 3 years (36
Administration to Egg-Allergic                                    alone; severe reactions involve cardio-                        months) and older should receive 0.5
Individuals                                                       vascular changes, respiratory and/or                           mL per dose.
Although both TIV and LAIV are pro-                               gastrointestinal tract symptoms, or
duced in eggs, recent data have shown                             reactions that require the use of epi-                         Intradermal Vaccine
that influenza vaccine administered in                             nephrine. Clinicians should consult                            The intradermal formulation of TIV
a single, age-appropriate dose is well                            with an allergist for children with a                          also is shipped and stored at 2°C to
tolerated by nearly all recipients who                            history of severe reaction. Most vac-                          8°C (35°F– 46°F). The package insert

PEDIATRICS Volume 128, Number 4, October 2011 from www.aappublications.org/news by guest on February 18, 2020                                                             7
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secretions or can increase the risk
                                                                                                   of aspiration, such as neurodevel-
                                                                                                   opmental disorders, spinal cord in-
                                                                                                   juries, seizure disorders, or neuro-
                                                                                                   muscular abnormalities.
                                                                                                Although universal immunization for
                                                                                                all people 6 months of age and older
                                                                                                is recommended for 2011–2012, par-
                                                                                                ticular immunization efforts with ei-
                                                                                                ther TIV or LAIV should be made for
                                                                                                the following groups to prevent
                                                                                                transmission of influenza to those at
                                                                                                risk, unless contraindicated:
                                                                                                ● Household contacts and out-of-
                                                                                                   home care providers of children
                                                                                                   younger than 5 years and at-risk
                                                                                                   children of all ages (healthy con-
                                                                                                   tacts 2– 49 years of age can receive
FIGURE 5                                                                                           either TIV or LAIV).
Precautions for administering influenza vaccine to presumed egg-allergic recipients.
                                                                                                ● Any female who is pregnant, consid-
                                                                                                   ering pregnancy, or breastfeeding
should be reviewed for full adminis-               dren 2 years of age and older can re-           during the influenza season (TIV
tration details of this new product,               ceive either TIV or LAIV. Particular fo-        only). Studies have found that in-
which is licensed for the 2011–2012                cus should be on the administration of          fants born to immunized women
season for persons 18 through 64                   TIV for all children and adolescents            have better influenza-related health
years of age.                                                                                      outcomes. However, data suggest
                                                   who have underlying medical condi-
                                                                                                   that no more than one-half of preg-
                                                   tions associated with an increased
Live-Attenuated (Intranasal)                                                                       nant women receive seasonal influ-
Vaccine                                            risk of complications from influenza,
                                                                                                   enza vaccine, although both preg-
                                                   including:
The cold-adapted LAIV formulation cur-                                                             nant women and their infants are at
                                                   ● Asthma or other chronic pulmonary             higher risk of complications. In ad-
rently licensed in the United States
                                                      diseases including cystic fibrosis.           dition, there is limited evidence that
must be shipped and stored at 2°C to
8°C and administered intranasally in a             ● Hemodynamically significant car-               influenza vaccination in pregnancy
prefilled, single-use sprayer contain-                 diac disease.                                might decrease the risk of preterm
ing 0.2 mL of vaccine. A removable                 ● Immunosuppressive disorders or
                                                                                                   birth.
dose-divider clip is attached to the                  therapy.                                  ● HCP or health care volunteers. De-
sprayer to administer 0.1 mL sepa-                                                                 spite the recent AAP recommenda-
                                                   ● HIV infection.
rately into each nostril. Any of the influ-                                                         tion for mandatory influenza immu-
                                                   ● Sickle  cell anemia and other                 nization for all HCP,2 many HCP
enza vaccines can be administered at
the same visit with all other recom-                  hemoglobinopathies.                          remain unvaccinated. As of January
mended routine vaccines. After ad-                 ● Diseases that require long-term as-           2010, the CDC estimated that only
ministration of any live-virus vac-                   pirin therapy, including juvenile id-        62% of HCP received the seasonal
cine, at least 4 weeks should pass                    iopathic arthritis and Kawasaki              vaccine and only 37% received the
before another live-virus vaccine is                  disease.                                     2009 H1N1 monovalent vaccine. HCP
administered.                                      ● Chronic renal dysfunction.
                                                                                                   frequently come into contact with
                                                                                                   patients at high risk of influenza ill-
CURRENT RECOMMENDATIONS                            ● Chronic metabolic disease includ-             ness in their clinical settings, so it is
Trivalent seasonal influenza immuniza-                 ing diabetes mellitus.                       paramount that HCP protect them-
tion is recommended for all children 6             ● Any condition that can compromise             selves against influenza to remain
months of age and older. Healthy chil-                respiratory function or handling of          influenza free, to prevent disease

8    FROM THE AMERICAN ACADEMY OF PEDIATRICS
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FROM THE AMERICAN ACADEMY OF PEDIATRICS

   transmission to patient populations               should be balanced against the po-             in the previous 12 months of age
   at high risk, and to avoid lost work-             tential morbidity and mortality as-            should not receive LAIV.
   place productivity.                               sociated with influenza for that indi-          When offering LAIV to children 24
● Close   contacts of immunosup-                     vidual child.                                  through 59 months of age, the clinician
   pressed people.                                ● Children who have received other                should screen them by asking the par-
                                                     live-virus vaccines within the previ-          ent/guardian the question, “In the pre-
CONTRAINDICATIONS AND
                                                     ous 4 weeks; however, other live-              vious 12 months, has a health care pro-
PRECAUTIONS
                                                     virus vaccines can be given on the             fessional ever told you that your child
Minor illnesses, with or without fe-                 same day as LAIV.                              had wheezing?” If a parent answers
ver, are not contraindications to the                                                               “yes” to this question, LAIV is not rec-
                                                  ● Children with asthma, children with
use of influenza vaccines, particu-                                                                  ommended for the child. TIV would be
                                                     other chronic disorders of the pul-
larly among children with mild upper                                                                recommended for the child to whom
                                                     monary or cardiovascular systems,
respiratory infection symptoms or                                                                   LAIV is not given.
allergic rhinitis.                                   or children 2 through 4 years of age
                                                     with a history of recurrent wheezing           In addition, TIV is the vaccine of choice
Children Who Should Not Be                           or a medically attended wheezing               for anyone in close contact with a sub-
Vaccinated With TIV                                  episode in the previous 12 months.             set of severely immunocompromised
                                                                                                    people (ie, people in a protected envi-
● Infants younger than 6 months.                  ● Children with chronic underlying medi-
                                                                                                    ronment). TIV is preferred over LAIV for
● Children who have a moderate-to-                   cal conditions including metabolic dis-
                                                                                                    contacts of severely immunocompro-
   severe febrile illness, on the basis of           ease, diabetes mellitus, renal dysfunc-
                                                                                                    mised people (ie, in a protected envi-
   clinical judgment of the provider.                tion, and hemoglobinopathies.
                                                                                                    ronment) because of the theoretical
● Children who are known to have ex-              ● Children who have known or sus-                 risk of infection in an immunocompro-
   perienced Guillain-Barré syndrome                 pected immunodeficiency disease                 mised contact of an LAIV-immunized
   (GBS) within 6 weeks after a previ-               or who are receiving immunosup-                person. Available data indicate that
   ous influenza vaccination; whether                 pressive or immunomodulatory                   there is a very low risk of transmission
   influenza vaccination specifically                  therapies.                                     of the virus in both children and adults
   might increase the risk of recur-              ● Children who are receiving aspirin              vaccinated with LAIV. HCP immunized
   rence of Guillain-Barré syndrome is               or other salicylates.                          with LAIV may continue to work in most
   unknown; the decision not to immu-                                                               units of a hospital, including the NICU
                                                  ● Any female who is pregnant or con-
   nize should be thoughtfully bal-                                                                 and general oncology wards, while us-
   anced against the potential morbid-               sidering pregnancy.
                                                                                                    ing standard infection-control tech-
   ity and mortality associated with              ● Children with any condition that can            niques. As a precautionary measure,
   influenza for that individual child.               compromise respiratory function or             people recently vaccinated with LAIV
                                                     handling of secretions or can in-              should restrict contact with severely
Children Who Should Not Be                           crease the risk for aspiration, such as
Vaccinated With LAIV                                                                                immunocompromised patients (eg, he-
                                                     neurodevelopmental disorders, spi-             matopoietic stem cell transplant recip-
● Children younger than 2 years.                     nal cord injuries, seizure disorders,          ients during periods that require a
● Children who have a moderate-to-                   or neuromuscular abnormalities.                protected environment) for 7 days af-
   severe febrile illness.                                                                          ter immunization, although there have
● Children with copious nasal conges-             PRECAUTIONS                                       been no reports of LAIV transmission
   tion that would impede vaccine                 LAIV is not recommended for children              from a vaccinated person to an immu-
   delivery.                                      with asthma. In the 2- through 4-year             nocompromised person. In the theo-
● Children who are known to have ex-              age range, many children have a his-              retical scenario in which symptomatic
   perienced Guillain-Barré syndrome              tory of wheezing with respiratory tract           LAIV infection develops in an immuno-
   within 6 weeks after a previous in-            illnesses and are eventually diagnosed            compromised host, oseltamivir or
   fluenza vaccination; whether influ-              with asthma. Therefore, because of the            zanamivir could be prescribed, be-
   enza vaccination specifically might             potential for increased wheezing after            cause LAIV strains are susceptible to
   increase the risk of recurrence of             immunization, children younger than 5             these antiviral medications.
   Guillain-Barré syndrome is un-                 years with recurrent wheezing or a                Information about influenza surveil-
   known; the decision not to immunize            medically attended wheezing episode               lance is available through the CDC

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TABLE 4 Recommended Dosage and Schedule of Influenza Antiviral Medications for Treatment and Chemoprophylaxis for the 2011–2012 Influenza
            Season: United States
                Medication                                                            Treatment (5 d)                                                    Chemoprophylaxis (10 d)
Oseltamivira
  Adults                                                               75 mg twice daily                                                        75 mg once daily
  Children ⬎12 mo
  Body weight
     ⱕ15 kg (ⱕ33 lb)                                                   30 mg twice daily                                                        30 mg once daily
     ⬎15 to 23 kg (33 to 51 lb)                                        45 mg twice daily                                                        45 mg once daily
     ⬎23 to 40 kg (⬎51 to 88 lb)                                       60 mg twice daily                                                        60 mg twice daily
     ⬎40 kg (⬎88 lb)                                                   75 mg twice daily                                                        75 mg once daily
  Children 3 to ⬍12 mob                                                3 mg/kg per dose twice daily                                             3 mg/kg per dose once per day
  Children 0 to ⬍3 moc                                                 3 mg/kg per dose twice daily                                             Not recommended unless situation
                                                                                                                                                  judged critical because of limited
                                                                                                                                                  data on use in this age group
Zanamivird
  Adults                                                               10 mg (two 5-mg inhalations) twice daily                                 10 mg (two 5-mg inhalations) once daily
  Children (ⱖ7 y for treatment, 5 y for                                10 mg (two 5-mg inhalations) twice daily                                 10 mg (two 5-mg inhalations) once daily
       chemoprophylaxis
a Oseltamivir is manufactured by Roche Laboratories (Nutley, NJ) and is administered orally without regard to meals, although administration with meals may improve gastrointestinal

tolerability. Oseltamivir is available as Tamiflu in 30-, 45-, and 75-mg capsules and as a powder for oral suspension that is reconstituted to provide a final concentration of 6 mg/mL. The
volume of oral suspension is being changed from 12 mg/mL to 6 mg/mL this year to reduce frothing when shaken. Oral suspensions in 12 mg/mL concentrations will remain available
until supplies run out. For the 6-mg/mL suspension, a 30-mg dose is given with 5 mL of oral suspension, 45-mg dose is given with 7.5 mL oral suspension, 60-mg dose is given
with 10 mL oral suspension, and 75-mg dose is given with 12.5 mL oral suspension. If the commercially manufactured oral suspension is not available, the capsules may be opened
and the contents mixed with a sweetened liquid to mask the bitter taste, or a suspension can be compounded by retail pharmacies (final concentration: 15 mg/mL). For patients with renal
insufficiency, the dose should be adjusted on the basis of creatinine-clearance rate. For treatment of patients with a creatinine-clearance rate of 10 to 30 mL/min: 75 mg once daily for 5 days.
For chemoprophylaxis of patients with a creatinine-clearance rate of 10 to 30 mL/min: 30 mg once daily for 10 days after exposure or 75 mg once every other day for 10 days after exposure
(5 doses). (See www.cdc.gov/flu/professionals/antivirals/antiviral-drug-resistance.htm.)
b Weight-based dosing is preferred; however, if weight is not known, dosing according to age for treatment (give 2 doses per day) or prophylaxis (give 1 dose per day) of influenza in term

infants younger than 1 year may be necessary: 0 to 3 months (treatment only), 12 mg (2 mL of 6 mg/mL commercial suspension); 4 to 5 months, 17 mg (2.8 mL of 6 mg/mL of commercial
suspension); 6 to 11 months, 24 mg (4 mL of 6 mg/mL commercial suspension). Although Emergency Use Authorization recommendations for use of oseltamivir in children younger than 1
y expired on June 23, 2010, this drug remains appropriate for use when indicated.
c Current weight-based dosing recommendations are not intended for preterm infants. Preterm infants may have slower clearance of oseltamivir because of immature renal function, and

doses recommended for term infants may lead to very high drug concentrations in this age group. Limited data from a cohort of preterm infants who received an average dose of 1.7 mg/kg
twice daily revealed drug concentrations higher than those observed with the recommended treatment dose in term infants (3 mg/kg twice daily). Observed drug concentrations were highly
variable among preterm infants. These data are insufficient to recommend a specific dose of oseltamivir for preterm infants.
d Zanamivir is manufactured by GlaxoSmithKline (King of Prussia, PA) and is administered by inhalation using a proprietary “Diskhaler” device distributed together with the medication.

Zanamivir is a dry powder (not an aerosol) and should not be administered by using nebulizers, ventilators, or other devices typically used for administering medications in aerosolized
solutions. Zanamivir is not recommended for persons with chronic respiratory diseases such as asthma or chronic obstructive pulmonary disease that increase the risk of bronchospasm.
Data source: Fiore AE, Fry A, Shay D, Gubareva L, Bresee JS, Uyeki TM; Centers for Disease Control and Prevention. MMWR Recomm Rep. 2011;60(RR-1):1–24.

Voice Information System (influenza                                VACCINE IMPLEMENTATION                                            ward that strain. For example, during
update, 888-232-3228) or at www.cdc.                              These updated recommendations for                                 the 2010 –2011 season, only 1.3% of in-
gov/flu/index.htm. Although current in-                            prevention and control of influenza in                             fluenza viruses tested were resistant
fluenza season data on circulating                                 children will have considerable opera-                            to oseltamivir, and none were resis-
strains do not necessarily predict                                                                                                  tant to zanamivir. High levels of resis-
                                                                  tional and fiscal effect on pediatric
which and in what proportion strains                                                                                                tance to amantadine and rimantadine
                                                                  practice. Therefore, the AAP has devel-
will circulate in the subsequent season,                                                                                            persist, and these drugs should not be
                                                                  oped implementation guidance on sup-
it is instructive to be aware of 2010 –2011                                                                                         used in the upcoming season unless
                                                                  ply, payment, coding, and liability is-
influenza surveillance data and use them                                                                                             resistance patterns change signifi-
                                                                  sues; these documents can be found at
as a guide to empiric therapy until cur-                                                                                            cantly (Table 1).
                                                                  www.aapredbook.org/implementation.
rent seasonal data are available from
the CDC. Information is posted weekly                                                                                               ● Oseltamivir is available in capsule
                                                                  USE OF ANTIVIRAL MEDICATIONS                                          and oral-suspension formulations.
by the CDC (www.cdc.gov/flu/weekly/
fluactivitysurv.htm). During the 2010 –                            Antiviral resistance can emerge                                       The manufactured liquid formulation
2011 season, most activity was attrib-                            quickly from one season to the next. If                               has a concentration of 6 mg/mL. Oral
utable to influenza A; approximately                               local or national influenza surveillance                               suspensions in 12 mg/mL concentra-
66% was attributable to influenza A                                data indicate a predominance of a par-                                tions will remain available until sup-
(H3N2) activity, and 34% was attribut-                            ticular influenza strain with a known                                  plies run out. If the commercially
able to 2009 (H1N1) activity. Activity                            antiviral-susceptibility profile, then                                 manufactured oral suspension is not
varied widely on a local level.                                   empiric treatment can be directed to-                                 available, the capsule might be

10      FROM THE AMERICAN ACADEMY OF PEDIATRICS
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FROM THE AMERICAN ACADEMY OF PEDIATRICS

TABLE 5 Persons at Higher Risk                                 Treatment should be considered for:         People with suspected influenza who
            Recommended for Antiviral
            Treatment for Suspected/Confirmed                   ● Any otherwise healthy child with in-      present with an uncomplicated febrile
            Influenza                                             fluenza infection for whom a de-           illness typically do not require treatment
Children ⬍2 y of age                                             crease in duration of clinical symp-      with antiviral medications unless they
Adults ⱖ65 y of age                                                                                        are at higher risk of influenza complica-
                                                                 toms is felt to be warranted by his
Persons with chronic pulmonary (including
  asthma), cardiovascular (except hypertension                   or her provider if treatment can be       tions, especially in situations with lim-
  alone), renal, hepatic, hematologic (including                 initiated within 48 hours of illness      ited antiviral medication availability.
  sickle cell disease), or metabolic (including                  onset.                                    Should there be a shortage of antiviral
  diabetes mellitus) disorders or neurologic and
                                                               Earlier treatment provides more opti-       medications, local public health authori-
  neurodevelopmental conditions (including
  disorders of the brain, spinal cord, peripheral              mal clinical responses, although treat-     ties might provide additional guidance
  nerve, and muscle, such as cerebral palsy,
                                                               ment after 48 hours of symptoms in          about testing and treatment. Rapid
  epilepsy [seizure disorders], stroke,
                                                               the child with moderate-to-severe dis-      antigen tests are not helpful in the
  intellectual disability [mental retardation],
  moderate-to-severe developmental delay,                      ease or with progressive disease            management of children with sus-
  muscular dystrophy, or spinal cord injury)
                                                               might still provide some benefit. Dos-       pected influenza.
Persons with immunosuppression, including that
  caused by medications or by HIV infection                    ages for antiviral agents for both treat-   Recommendations for chemoprophy-
Women who are pregnant or in the postpartum                    ment and chemoprophylaxis in children       laxis during an influenza outbreak:
  period (within 2 wk after delivery)
Persons aged ⬍19 y who are receiving long-term
                                                               can be found in Table 4 and on the          ● For children at high risk of compli-
  aspirin therapy                                              CDC Web site (antivirals/index.htm;/          cations from influenza for whom in-
American Indian/Alaska Native persons                          Border [0 0 0]?⬎www.cdc.gov/flu/               fluenza vaccine is contraindicated.
Persons who are morbidly obese (ie, BMI ⱖ 40)                  professionals/antivirals/index.htm).
Residents of nursing homes and other chronic                                                               ● For children at high risk during the 2
  care facilities                                              Children younger than 1 year are at           weeks after influenza immunization.
Data source: Fiore AE, Fry A, Shay D, Gubareva L, Bresee JS,   increased risk of influenza-related
                                                                                                           ● For family members or HCP who are
Uyeki TM; Centers for Disease Control and Prevention.          complications. Although there are no
MMWR Recomm Rep. 2011;60(RR-1):1–24.
                                                               antiviral medications licensed by the         unimmunized and are likely to have
                                                               Food and Drug Administration for              ongoing, close exposure to:
    opened and the contents mixed with a                       this age group and the 2009 H1N1              ●   unimmunized children at high
    sweetened liquid by retail pharma-                         pandemic Emergency Use Authoriza-                 risk; or
    cies to a final concentration of 15                         tion has expired, recommendations             ●   infants and toddlers who are
    mg/mL (Table 4, footnote “a”).                             for use of oseltamivir in this young              younger than 24 months.
● Current treatment guidelines (Table                          age group can still be followed and         ● For control of influenza outbreaks
    4) are applicable to infants and chil-                     are provided in Table 4.                      for unimmunized staff and children
    dren with suspected influenza when                          Clinical judgment (based on underly-          in a closed institutional setting with
    known virus strains are circulating                        ing conditions, disease severity, time        children at high risk (eg, extended
    in the community or when infants or                        since symptom onset, and local influ-          care facilities).
    children are confirmed to have sea-                         enza activity) is an important factor in
                                                                                                           ● As a supplement to immunization
    sonal influenza.                                            treatment decisions for pediatric pa-
                                                                                                             among children at high risk, includ-
● Continuous monitoring of the epide-                          tients who present with influenza-
                                                                                                             ing children who are immunocom-
    miology, change in severity, and                           likeillness. Antiviral treatment should
                                                                                                             promised and might not respond to
    resistance patterns of influenza                            be started as soon as possible after
                                                                                                             vaccine.
    strains might lead to new guidance.                        illness onset and should not be de-
                                                               layed while waiting for a definitive in-     ● As postexposure prophylaxis for
Treatment should be offered for:                                                                             family members and close contacts
                                                               fluenza test result. Currently available
● Any child hospitalized with pre-                             rapid antigen tests have low sensitiv-        of an infected person if those people
    sumed influenza or with severe,                             ity, particularly for the 2009 pandemic       are at high risk of complications
    complicated, or progressive illness,                       influenza A (H1N1) virus strain and            from influenza.
    regardless of influenza immuniza-                           should not be used to rule out influ-        ● For children at high risk and their
    tion status.                                               enza. Negative results from rapid anti-       family members and close contacts,
● Influenza infection of any severity in                        gen tests should not be used to               as well as HCP, when circulating
    children at high risk of complica-                         make treatment or infection-control           strains of influenza virus in the com-
    tions of influenza infection (Table 5.)                     decisions.                                    munity are not matched with triva-

PEDIATRICS Volume 128, Number 4, October 2011 from www.aappublications.org/news by guest on February 18, 2020                                     11
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lent seasonal influenza vaccine              home. However, medical homes might               immunization programs. Optimal pre-
     strains, on the basis of current data       have limited capacity to accommodate             vention of influenza in the health care
     from the CDC and local health               all patients (and their families) who            setting depends on coverage of at
     departments.                                seek influenza immunization. Because              least 90% of HCP. Finally, efforts are
These recommendations apply to rou-              of the increased demand for immuni-              underway to improve the vaccine-
tine circumstances, but it should be             zation during each influenza season,              development process to allow for a
noted that guidance might change on              the AAP and the CDC recommend vac-               shorter interval between identification
the basis of updated recommenda-                 cine administration at any visit to the          of vaccine strains and vaccine
tions from the CDC in concert with               medical home during influenza season              production.
antiviral-agent availability, local re-          when it is not contraindicated, at spe-
sources, clinical judgment, recom-               cially arranged “vaccine-only” ses-              COMMITTEE ON INFECTIOUS DISEASES,
mendations from local or public health           sions, and through cooperation with              2011–2012
                                                 community sites, schools, and child              Michael T. Brady, MD, Chairperson
authorities, risk of influenza complica-                                                           Carrie L. Byington, MD
tions, type and duration of exposure             care centers to provide influenza vac-            H. Dele Davies, MD
contact, and change in epidemiology              cine. If alternate venues are used, a            Kathryn M. Edwards, MD
                                                 system of patient record transfer is             Mary P. Glode, MD
or severity of influenza.                                                                          Mary Anne Jackson, MD
Chemoprophylaxis should not be con-              beneficial for ensuring maintenance               Harry L. Keyserling, MD
sidered a substitute for immunization.           of accurate immunization records.                Yvonne A. Maldonado, MD
                                                 Immunization-information      systems            Dennis L. Murray, MD
Influenza vaccine should always be of-                                                             Walter A. Orenstein, MD
fered when not contraindicated, even             should be used whenever available.               Gordon E. Schutze, MD
when influenza virus is circulating in            Cost-effectiveness and logistic feasibil-        Rodney E. Willoughby, MD
                                                                                                  Theoklis E. Zaoutis, MD
the community. Antiviral medications             ity of vaccinating everyone continue to
currently licensed are important ad-             be concerns. With universal immuniza-            FORMER COMMITTEE MEMBER
juncts to influenza immunization for              tion, particular attention is being paid         Margaret C. Fisher, MD
control and prevention of influenza               to vaccine supply, distribution, imple-
                                                 mentation, and financing. Potential               LIAISONS
disease, but indiscriminate use might                                                             Marc A. Fischer, MD – Centers for Disease
promote resistance and/or limit avail-           benefits of more widespread child-                   Control and Prevention
ability (Table 1). Providers should in-          hood immunization among recipients,              Bruce Gellin, MD – National Vaccine Program
                                                 their contacts, and the community in-               Office
form recipients of antiviral chemopro-
                                                                                                  Richard L. Gorman, MD – National Institutes of
phylaxis that risk of influenza is                clude fewer influenza cases, fewer out-              Health
lowered but still remains while taking           patient visits and hospitalizations for          Lucia Lee, MD – Food and Drug Administration
medication, and susceptibility to influ-          influenza infection, and a decrease in            R. Douglas Pratt, MD – Food and Drug
                                                                                                     Administration
enza returns when medication is                  the use of antimicrobial agents, absen-          Jennifer S. Read, MD – National Vaccine
discontinued. For recommendations                teeism from school, and lost parent                 Program Office
about treatment and chemoprophy-                 work time.                                       Joan Robinson, MD – Canadian Paediatric
                                                                                                     Society
laxis against influenza, see Table 4. Up-         Continued evaluation of the safety, im-          Jane Seward, MBBS, MPH – Centers for
dates will be available at www.                  munogenicity, and effectiveness of in-              Disease Control and Prevention
aapredbook.org/flu and www.cdc.                                                                    Jeffrey R. Starke, MD – American Thoracic
                                                 fluenza vaccine, especially for children
                                                                                                     Society
gov/flu/professionals/antivirals/index.           younger than 2 years, is important. De-          Jack Swanson, MD – Committee on Practice
htm.                                             velopment of a safe, immunogenic vac-               Ambulatory Medicine
                                                 cine for infants younger than 6 months           Tina Q. Tan, MD – Pediatric Infectious Diseases
FUTURE NEEDS                                                                                         Society
                                                 is essential. Consideration of how best
Manufacturers anticipate being able              to offer to immunize parents and adult           EX OFFICIO
to provide adequate supplies of vac-             child care providers in the pediatric            Carol J. Baker, MD – Red Book Associate Editor
                                                                                                  Henry H. Bernstein, DO – Red Book Associate
cine. Efforts should be made to create           office setting continues to be investi-
                                                                                                     Editor
adequate outreach and infrastructure             gated. Mandatory annual influenza im-             David W. Kimberlin, MD – Red Book Associate
to ensure an optimal distribution of             munization has been implemented                     Editor
vaccine so that more people are immu-            successfully at pediatric institutions,          Sarah S. Long, MD – Red Book Associate Editor
                                                                                                  H. Cody Meissner, MD – Red Book Associate
nized. Health care for children should           and future efforts should include                   Editor
be provided in the child’s medical               broader implementation of mandatory              Larry K. Pickering, MD – Red Book Editor

12      FROM THE AMERICAN ACADEMY OF PEDIATRICS
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