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Volume 19, Number 8—August 2013

Dispatch

Monitoring Avian Influenza A(H7N9) Virus through National Influenza-like Illness Surveillance, China

Cuiling Xu, Fiona Havers, Lijie Wang, Tao Chen, Jinghong Shi, Dayan Wang, Jing Yang, Lei Yang, Marc-Alain Widdowson, and Yuelong ShuComments to Author 
Author affiliations: Chinese Center for Disease Control and Prevention, Beijing, China (C. Xu, L. Wang, T. Chen, J. Shi, D. Wang, J. Yang, L. Yang, Y. Shu); US Centers for Disease Control and Prevention, Atlanta, Georgia, USA. (F. Havers, M.-A. Widdowson)

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Table 2

Number of ILI patients positive for avian influenza A(H7N9) virus in areas with confirmed infections among humans, China, March 4–April 28, 2013*

Area† No. positive/no. tested
Anhui 1/3,478
Beijing 0/1,392
Fujian 0/1,154
Henan 0/1,893
Hunan‡ 1/1,912
Jiangsu 2/3,369
Jiangxi 1/1,588
Shandong 0/1,848
Shanghai 1/2,490
Zhejiang 0/1,615
Total 6/20,739

*ILI, influenza-like illness.
†All areas are provinces, except Beijing Municipality.
‡Positive patient, a resident of Shanghai, stayed for 2–3 d in Hunan, where he visited the sentinel hospital and then returned to Shanghai.

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