The substitution V379I in PA protein attenuates the pathogenicity of influenza A(H1N1) pdm09 viruses

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Dear Editor,Since August 2010,the world was in the post-pandemic period and the influenza A(H1N1)pdm09(pdmH1N1)virus co-circulated with H3N2 and B virus seasonally(WHO,2010).The continuous surveillance on the pdmH1N1 virus in the post-pandemic period was
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