title: Impact of influenza on young children and the shaping of United States influenza vaccine policy.
abstract: BACKGROUND
  In 2002 the Advisory Committee on Immunization Practices (ACIP) began encouraging annual influenza vaccination of children 6 to 23 months of age, when feasible.
  
  
  METHODS
  Literature and issues related to annual influenza vaccination of young children were reviewed.
  
  
  RESULTS
  The ACIP first encouraged influenza vaccination of children 6 to 23 months of age in 2002 because recent studies showed that influenza-related hospital admissions were substantially higher among healthy children <2 years than among healthy older children or young adults. However, the ACIP deferred a full recommendation for several reasons, including limited safety and efficacy data on trivalent inactivated influenza virus in the 6- to 23-month age group, the need for more education of parents and physicians and concerns over the stability and adequacy of the vaccine supply.
  
  
  CONCLUSIONS
  The risk of hospital admission from influenza-related causes is high in young children and similar to the risk in the elderly and other high risk groups for whom annual influenza vaccination is already recommended. Data from additional studies, especially those on vaccine safety and efficacy, will be important for proceeding to a full recommendation for annual influenza vaccination of children 6 to 23 months.
authors.affiliation: Influenza Branch, Division of Viral and Rickettsial Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Epidemiology Program Office, Atlanta, GA 30333, USA.
authors.forename: Pauline
authors.initials: P
authors.lastname: Terebuh
authors.forename: Timothy
authors.initials: T
authors.lastname: Uyeki
authors.forename: Keiji
authors.initials: K
authors.lastname: Fukuda
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000368:Aged; D002648:Child; D002675:Child, Preschool; D003140:Communicable Disease Control / Q000458:organization & administration*; D005260:Female; D006760:Hospitalization / Q000706:statistics & numerical data; D006801:Humans; D017589:Immunization Programs / Q000458:organization & administration*; D007115:Immunization Schedule; D015994:Incidence; D007223:Infant; D007252:Influenza Vaccines / Q000008:administration & dosage*; D007251:Influenza, Human / Q000453:epidemiology / Q000517:prevention & control*; D008297:Male; D008875:Middle Aged; D011050:Policy Making; D016730:Program Development; D015397:Program Evaluation; D018570:Risk Assessment; D017678:Sex Distribution; D014481:United States / Q000453:epidemiology; D014611:Vaccination / Q000379:methods
chemical_list: D007252:Influenza Vaccines