作者: Hiromichi Mitake , Atsuhiro Yasuhara , Tiago J. S. Lopes , Yuko Tagawa-Sakai , Kohei Shimizu
DOI: 10.3390/V12020155
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摘要: The A(H1N1)pdm09 virus emerged in 2009 and continues to circulate human populations. Recent viruses, that is, viruses circulating the post-pandemic era, can cause more or less severe infections than those caused by initial pandemic viruses. To evaluate changes pathogenicity of during their continued circulation humans, we compared nucleotide amino acid sequences ten isolated Japan between 2015, experimentally infected mice with each virus. severity infection these Japanese isolates ranged from milder prototypic strain A/California/04/2009 (CA04/09); however, specific mutations responsible for have not yet been identified.