Influenza immunization.
D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007115:Immunization Schedule; D007223:Infant; D007252:Influenza Vaccines / Q000008:administration & dosage*; D007251:Influenza, Human / Q000517:prevention & control*; D014677:Pharmaceutical Vehicles; D014481:United States
D007252:Influenza Vaccines; D014677:Pharmaceutical Vehicles