Article
Evolution and Antigenic Drift of Influenza A (H7N9) Viruses, China, 2017–2019
13 Jul 2020
Abstract excerpt
S ince emerging in China in 2013, influenza A(H7N9) viruses have continued to circulate in mainland China, sporadically causing human infection (1-3). As of February 2020, a total of 1,568 laboratory-confirmed human cases and 616 related deaths had been reported, for a fatality rate of 40% (http://www.fao.org/ag/againfo/programmes/ en/empres/H7N9/situation_update.html). In mid-2016, a highly pathogenic avian...
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