The epidemiology of influenza. 1919.
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D004196:Disease Outbreaks / Q000266:history*; D004813:Epidemiology / Q000266:history; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D007251:Influenza, Human / Q000453:epidemiology / Q000266:history*; D014481:United States / Q000453:epidemiology