title: Severe acute respiratory syndrome.
mesh_terms: D006723:Hong Kong / Q000453:epidemiology; D006801:Humans; D009864:Ontario / Q000453:epidemiology; D045169:Severe Acute Respiratory Syndrome / Q000453:epidemiology* / Q000635:transmission*; D012846:Singapore / Q000453:epidemiology; D014944:World Health Organization