Abstract:
:H7N9 subtype avian influenza viruses (AIV) circulating in China over recent years have had an enormous impact on public health and economy. During the period between November 2016 and April 2017, an increase in human infections caused by these viruses was reported, with rapid emergence and spread of variants in China. Consequently, the government of China implemented a controversial vaccination strategy in September 2017. Here, we provide evidence of the prevalence of H7N9 AIVs in China based on systematic large-scale surveillance in poultry during 2013-2018. Emerging variants were confirmed as highly pathogenic in chickens using the intravenous pathogenicity index (IVPI) test. The currently available vaccine provided complete protection against the H7N9 HPAIV challenge in chickens. The collective findings clearly indicate that the vaccination strategy implemented not only significantly decreases the prevalence of H7N9 AIVs in poultry but also effectively prevents human infection with H7N9 viruses.
journal_name
Transbound Emerg Disjournal_title
Transboundary and emerging diseasesauthors
Jiang W,Hou G,Li J,Peng C,Wang S,Liu S,Zhuang Q,Chen J,Liu Hdoi
10.1111/tbed.13183subject
Has Abstractpub_date
2019-07-01 00:00:00pages
1758-1761issue
4eissn
1865-1674issn
1865-1682journal_volume
66pub_type
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