The re-emergence of highly pathogenic #avian #influenza #H7N9 viruses in #human[s] in mainland #China, 2019 (Euro Surveill., abstract)

[Source: Eurosurveillance, full page: (LINK). Abstract, edited.]

The re-emergence of highly pathogenic avian influenza H7N9 viruses in humans in mainland China, 2019

Deshan Yu1,2, Guofeng Xiang1,3, Wenfei Zhu1,4, Xia Lei1,5, Baodi Li2, Yao Meng4, Lei Yang4, Hongyan Jiao6,Xiyan Li4, Weijuan Huang4, Hejiang Wei4, Yanping Zhang7, Yan Hai5, Hui Zhang2, Hua Yue5, Shumei Zou4, Xiang Zhao4, Chao Li7, Deng Ao6,Ye Zhang4, Minju Tan4, Jia Liu4, Xuemei Zhang6, George F. Gao4,7, Lei Meng2,8, Dayan Wang4,8

Affiliations: 1 These authors contributed equally in this study as first authors; 2 Gansu Provincial Center for Disease Control and Prevention, Lanzhou China; 3 Jiuquan Center for Disease Control and Prevention, Jiuquan, China; 4 National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention; WHO Collaborating Center for Reference and Research on Influenza; Key Laboratory for Medical Virology, National Health Commission, Beijing, China; 5 Inner Mongolia Center for Disease Control and Prevention, Hohehot, China; 6 Alasan League Center for Disease Control and Prevention, Alasan, China; 7 Chinese Center for Disease Control and Prevention, Beijing, China; 8 These authors contributed equally as last authors in this study

Correspondence:  Dayan Wang

Citation style for this article: Yu Deshan, Xiang Guofeng, Zhu Wenfei, Lei Xia, Li Baodi, Meng Yao, Yang Lei, Jiao Hongyan, Li Xiyan, Huang Weijuan, Wei Hejiang,Zhang Yanping, Hai Yan, Zhang Hui, Yue Hua, Zou Shumei, Zhao Xiang, Li Chao, Ao Deng, Zhang Ye, Tan Minju, Liu Jia, Zhang Xuemei, Gao George F., Meng Lei,Wang Dayan. The re-emergence of highly pathogenic avian influenza H7N9 viruses in humans in mainland China, 2019. Euro Surveill. 2019;24(21):pii=1900273.

Received: 06 May 2019;   Accepted: 23 May 2019



After no reported human cases of highly pathogenic avian influenza (HPAI) H7N9 for over a year, a case with severe disease occurred in late March 2019. Among HPAI H7N9 viral sequences, those recovered from the case and from environmental samples of a poultry slaughtering stall near their home formed a distinct clade from 2017 viral sequences. Several mutations possibly associated to antigenic drift occurred in the haemagglutinin gene, potentially warranting update of H7N9 vaccine strains.

©  This work is licensed under a Creative Commons Attribution 4.0 International License.

Keywords: Avian Influenza; H7N9; Human; Poultry; Gansu; Inner Mongolia; China.


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Giuseppe Michieli

I am an Italian blogger, active since 2005 with main focus on emerging infectious diseases such as avian influenza, SARS, antibiotics resistance, and many other global Health issues. Other fields of interest are: climate change, global warming, geological and biological sciences. My activity consists mainly in collection and analysis of news, public services updates, confronting sources and making decision about what are the 'signals' of an impending crisis (an outbreak, for example). When a signal is detected, I follow traces during the entire course of an event. I started in 2005 my blog ''A TIME'S MEMORY'', now with more than 40,000 posts and 3 millions of web interactions. Subsequently I added an Italian Language blog, then discontinued because of very low traffic and interest. I contributed for seven years to a public forum ( in the midst of the Ebola epidemic in West Africa in 2014, I left the site to continue alone my data tracking job.