title: USA reworks its case definition for SARS.
authors.forename: Mary
authors.initials: M
authors.lastname: Quirk
mesh_terms: D006801:Humans; D011159:Population Surveillance / Q000379:methods*; D045169:Severe Acute Respiratory Syndrome / Q000175:diagnosis / Q000453:epidemiology / Q000503:physiopathology; D014481:United States / Q000453:epidemiology