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Volume 19, Number 8—August 2013

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 1

Number of ILI patients, by age, positive for avian influenza A(H7N9) virus, China, March 4–April 28, 2013*

Patient age, y No. positive/no. tested
Persons from 10 outbreak-affected areas† Persons from 21 non-affected provinces
0–4 2/6,333 0/10,419
5–14 0/3,702 0/4,452
15–24 0/3,210 0/3,259
25–59 3/6,109 0/6,627
>60 1/1,385 0/1,311
Total 6/20,739 0/26,068

*ILI, influenza-like illness.
†Areas include Beijing and Shanghai Municipalities and Anhui, Jiangsu, Zhejiang, Shandong, Henan, Fujian, Jiangxi, and Hunan Provinces.

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Page created: July 19, 2013
Page updated: July 19, 2013
Page reviewed: July 19, 2013
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.