Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2017 Jan 18;8(1):6-14.
doi: 10.5365/WPSAR.2017.8.1.001. eCollection 2017 Jan-Mar.

Sudden increase in human infection with avian influenza A(H7N9) virus in China, September-December 2016

Lei Zhou  1 , Ruiqi Ren  1 , Lei Yang  2 , Changjun Bao  3 , Jiabing Wu  4 , Dayan Wang  5 , Chao Li  1 , Nijuan Xiang  1 , Yali Wang  1 , Dan Li  1 , Haitian Sui  1 , Yuelong Shu  5 , Zijian Feng  6 , Qun Li  1 , Daxin Ni  1
Affiliations

Sudden increase in human infection with avian influenza A(H7N9) virus in China, September-December 2016

Lei Zhou et al. Western Pac Surveill Response J. .

Abstract

Since the first outbreak of avian influenza A(H7N9) virus in humans was identified in 2013, there have been five seasonal epidemics observed in China. An earlier start and a steep increase in the number of humans infected with H7N9 virus was observed between September and December 2016, raising great public concern in domestic and international societies. The epidemiological characteristics of the recently reported confirmed H7N9 cases were analysed. The results suggested that although more cases were reported recently, most cases in the fifth epidemic were still highly sporadically distributed without any epidemiology links; the main characteristics remained unchanged and the genetic characteristics of virus strains that were isolated in this epidemic remained similar to earlier epidemics. Interventions included live poultry market closures in several cities that reported more H7N9 cases recently.

PubMed Disclaimer

Figures

Figure 1a
Figure 1a
Geographic distribution of human infection with H7N9 virus in China [excluding Hong Kong SAR (China), Macao SAR (China) and Taiwan, China], February 2013–December 2016
Figure 1b
Figure 1b
Epidemic curve of human infection with H7N9 virus in China [excluding Hong Kong SAR (China), Macao SAR (China) and Taiwan, China] by week, February 2013–December 2016
Figure 1c
Figure 1c
Geographic distribution of human infection with H7N9 virus in China [excluding Hong Kong SAR (China), Macao SAR (China) and Taiwan, China], September 2016–December 2016
Figure 1d
Figure 1d
Epidemic curve of human infection with H7N9 virus in China [excluding Hong Kong SAR (China), Macao SAR (China) and Taiwan, China] by day, September 2016–December 2016
See this image and copyright information in PMC

Similar articles

See all similar articles

Cited by

See all "Cited by" articles

References

    1. Li Q, Zhou L, Zhou M, Chen Z, Li F, Wu H, et al. Preliminary report: epidemiology of the avian influenza A(H7N9) outbreak in China. N Engl J Med. 2013
    1. Xiang N, Li X, Ren R, Wang D, Zhou S, Greene CM, et al. Assessing change in avian influenza A(H7N9) virus infections during the fourth epidemic - China, September 2015-August 2016. MMWR Morb Mortal Wkly Rep. 2016. December 16;65(49):1390–4. 10.15585/mmwr.mm6549a2 - DOI - PubMed
    1. Xiang N, Iuliano AD, Zhang Y, Ren R, Geng X, Ye B, et al. Comparison of the first three waves of avian influenza A(H7N9) virus circulation in the mainland of the People’s Republic of China. BMC Infect Dis. 2016. December 05;16(1):734. 10.1186/s12879-016-2049-2 - DOI - PMC - PubMed
    1. Human infection with avian influenza A(H7N9) virus – China. Disease Outbreak News. 17 January 2017. Geneva: World Health Organization; 2017 (http://www.who.int/csr/don/17-january-2017-ah7n9-china/en/, accessed on 18 January 2017).
    1. Gao R, Cao B, Hu Y, Feng Z, Wang D, Hu W, et al. Human infection with a novel avian-origin influenza A (H7N9) virus. N Engl J Med. 2013. May 16;368(20):1888–97. 10.1056/NEJMoa1304459 - DOI - PubMed

MeSH terms

LinkOut - more resources