Lessons from SARS.
D002170:Canada / Q000453:epidemiology; D002681:China / Q000453:epidemiology; D003140:Communicable Disease Control / Q000379:methods*; D021821:Communicable Diseases, Emerging / Q000453:epidemiology* / Q000517:prevention & control*; D014943:Global Health; D006801:Humans; D009313:National Health Programs / Q000458:organization & administration; D020380:Needs Assessment; D011159:Population Surveillance; D045169:Severe Acute Respiratory Syndrome / Q000453:epidemiology* / Q000517:prevention & control*; D014195:Travel