Epidemiology of influenza in man.
D000293:Adolescent; D000328:Adult; D000368:Aged; D000914:Antibodies, Viral / Q000032:analysis; D000956:Antigens, Viral / Q000235:genetics; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks / Q000453:epidemiology*; D004739:England; D004812:Epidemiologic Methods; D005544:Forecasting; D014644:Genetic Variation; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D007223:Infant; D009980:Influenza A virus / Q000276:immunology; D007251:Influenza, Human / Q000453:epidemiology* / Q000401:mortality / Q000635:transmission; D008875:Middle Aged; D009975:Orthomyxoviridae / Q000276:immunology; D014852:Wales
D000914:Antibodies, Viral; D000956:Antigens, Viral