Antigenic variation of influenza A (H3N2) virus in relation to influenza epidemics in Shanghai (1968-1977).
D000956:Antigens, Viral / Q000276:immunology* / Q000302:isolation & purification; D002681:China; D004196:Disease Outbreaks / Q000453:epidemiology*; D006801:Humans; D053122:Influenza A Virus, H3N2 Subtype; D009980:Influenza A virus / Q000276:immunology*; D007251:Influenza, Human / Q000453:epidemiology*
D000956:Antigens, Viral