Table 1.

  Case Definition of Severe Acute Respiratory Syndrome (SARS), Hong Kong Hospital Authority SARS Registry, April 22, 2003

Inclusion Criteria	Exclusion Criteria
Radiographic evidence of infiltrates consistent with  pneumonia	A case should be excluded if an alternative diagnosis can fully explain the illness
Temperature >38oC or history of such temperature at any  time in the previous 2 days
At least two of the following
History of chills in the previous 2 days
Cough (new or increased) or breathing difficulty
General malaise or myalgia
Known history of exposure