[Present characteristics of the epidemiology of influenza A].
D014943:Global Health; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D009980:Influenza A virus; D007251:Influenza, Human / Q000453:epidemiology* / Q000266:history
Sovremennye osobennosti epidemiologii grippa A.