Influenza.
D001118:Argentina / Q000453:epidemiology; D002681:China / Q000453:epidemiology; D006801:Humans; D053122:Influenza A Virus, H3N2 Subtype; D009981:Influenza B virus; D007251:Influenza, Human / Q000453:epidemiology* / Q000821:virology; D009520:New Zealand / Q000453:epidemiology