Update: influenza--United States, 1988-89 season.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D001241:Aspirin / Q000009:adverse effects; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks; D006801:Humans; D007223:Infant; D009980:Influenza A virus / Q000302:isolation & purification; D009981:Influenza B virus / Q000302:isolation & purification; D007251:Influenza, Human / Q000453:epidemiology* / Q000401:mortality; D008875:Middle Aged; D013997:Time Factors; D014481:United States
D001241:Aspirin