title: Usage of quadrivalent influenza vaccine among children in the United States, 2013-14.
abstract: Annual influenza vaccination is recommended for everyone ≥ 6 months in the U.S. During the 2013-14 influenza season, in addition to trivalent influenza vaccines, quadrivalent vaccines were available, protecting against two influenza A and two influenza B viruses. We analyzed 1,976,443 immunization records from six sentinel sites to compare influenza vaccine usage among children age 6 months-18 years. A total of 983,401 (49.8%) influenza vaccine doses administered were trivalent and 920,333 (46.6%) were quadrivalent (unknown type: 72,709). Quadrivalent vaccine administration varied by age and was least frequent among those <2 years of age.
authors: Immunization Information Systems Support Branch, Immunization Services Division, Centers for Disease Control and Prevention, Atlanta, GA, United States. Electronic address: lrodgers@cdc.gov.
authors: Loren
authors: L
authors: Rodgers
authors: Immunization Information Systems Support Branch, Immunization Services Division, Centers for Disease Control and Prevention, Atlanta, GA, United States.
authors: Laura J
authors: LJ
authors: Pabst
authors: Immunization Information Systems Support Branch, Immunization Services Division, Centers for Disease Control and Prevention, Atlanta, GA, United States.
authors: Liping
authors: L
authors: Zhu
authors: Epidemiology and Preparedness Branch, Influenza Division, Centers for Disease Control and Prevention, Atlanta, GA, United States.
authors: Sandra S
authors: SS
authors: Chaves
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D009980:Influenza A virus / Q000276:immunology; D009981:Influenza B virus / Q000276:immunology; D007252:Influenza Vaccines / Q000008:administration & dosage*; D007251:Influenza, Human / Q000517:prevention & control* / Q000821:virology; D008297:Male; D012042:Registries; D012621:Seasons; D018571:Sentinel Surveillance; D014481:United States; D014611:Vaccination / Q000706:statistics & numerical data*
chemical_list: D007252:Influenza Vaccines
keywords: Child; Human; Immunization information systems; Influenza; Influenza vaccines; Preschool; Quadrivalent; Registries; Trivalent; Vaccination; Vaccine coverage