Cigarette smoking and epidemic influenza.
D000293:Adolescent; D000328:Adult; D004196:Disease Outbreaks; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D007251:Influenza, Human / Q000453:epidemiology*; D008297:Male; D009975:Orthomyxoviridae / Q000302:isolation & purification; D012907:Smoking; D014611:Vaccination