Influenza (as of 8 February 2008).
D005060:Europe / Q000453:epidemiology; D014943:Global Health; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype; D053122:Influenza A Virus, H3N2 Subtype; D007251:Influenza, Human / Q000453:epidemiology*; D029524:Betainfluenzavirus; D009656:North America / Q000453:epidemiology