Severe acute respiratory syndrome (SARS)

Early cases of SARS appeared to originate in southern China (Guangdong province), presenting as an unusual epidemic of severe pneumonia in November 2002. In 2003, an international outbreak developed involving 29 countries with 8098 cases of probable SARS and 774 (9.6%) deaths.[2]World Health Organization: global alert and response (GAR). Summary of probable SARS cases with onset of illness from 1 November 2002 to 31 July 2003. December 2003 [internet publication]. http://www.who.int/csr/sars/country/table2004_04_21/en Most of what is known about the disease has been provided by this 2003 outbreak. The countries with the greatest number of reported cases included China, Hong Kong, Taiwan, Singapore, and Canada.

There are no known cases of SARS transmission in any part of the world. The last known case was on 15 July 2003, in Taiwan. Since then, seven additional sporadic cases in humans have been reported: two laboratory-acquired in Singapore and Taiwan in 2003, and a cluster of five confirmed cases in China in April 2004.