We have been warned.
D000818:Animals; D021821:Communicable Diseases, Emerging / Q000453:epidemiology* / Q000517:prevention & control; D004196:Disease Outbreaks; D014943:Global Health; D006285:Health Planning; D006801:Humans; D007251:Influenza, Human / Q000453:epidemiology; D011159:Population Surveillance; D045169:Severe Acute Respiratory Syndrome / Q000453:epidemiology* / Q000517:prevention & control; D014944:World Health Organization