Update: influenza activity--United States and worldwide, and the composition of the 1991-92 influenza vaccine.
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks / Q000517:prevention & control; D014943:Global Health; D006801:Humans; D007223:Infant; D009980:Influenza A virus / Q000276:immunology; D009981:Influenza B virus / Q000276:immunology; D007252:Influenza Vaccines / Q000032:analysis; D007251:Influenza, Human / Q000453:epidemiology* / Q000517:prevention & control; D008875:Middle Aged; D014481:United States / Q000453:epidemiology
D007252:Influenza Vaccines