Pandemic (H1N1) 2009, Shanghai, China | CDC EID

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Volume 16, Number 6–June 2010
Dispatch
Pandemic (H1N1) 2009, Shanghai, China
Yinzhong Shen and Hongzhou Lu
Author affiliation: Shanghai Public Health Clinical Center, Shanghai, People's Republic of China

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Abstract
To understand the clinical and epidemiologic characteristics of pandemic (H1N1) 2009 virus infection, we retrospectively reviewed medical records of 237 patients with laboratory-confirmed cases reported in Shanghai, China, during May–July 2009. Surveillance activities effectively contained the outbreak and provided useful epidemiologic data for future strategies.
In early April 2009, human infections caused by pandemic (H1N1) 2009 virus were identified in the United States (1) and Mexico (2). The virus then spread rapidly around the world. The People's Republic of China reported its first case of pandemic (H1N1) 2009 on May 10, 2009. As of July 31, a total of 2,090 confirmed cases had been reported in mainland China. Cases were detected in 25 provinces and municipalities; the largest numbers of cases were found in Guangdong Province, Beijing, and Shanghai. To understand the clinical and epidemiologic characteristics of infected patients, we reviewed medical records of 237 patients with laboratory-confirmed cases reported in Shanghai during May–July 2009.

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