Disease watch.
D000349:Africa / Q000453:epidemiology; D002681:China; D002771:Cholera / Q000453:epidemiology*; D006801:Humans; D007251:Influenza, Human / Q000453:epidemiology*; D011051:Poliomyelitis / Q000453:epidemiology*; D045169:Severe Acute Respiratory Syndrome / Q000453:epidemiology*; D014744:Vietnam / Q000453:epidemiology