• Open Access

Eight-hospital based influenza like illness surveillance from April, 2009 to March, 2011 in China

Authors


Wei Liu, Wuchun Cao, Department of Epidemiology, Beijing Institute of Microbiology and Epidemiology, Beijing, China. E-mail: liu_weis@sohu.com and caowc@nic.bmi.ac.cn

No abstract is available for this article.

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