这个词是什么意思？
A subtype of INFLUENZA A VIRUS with the surface proteins hemagglutinin 1 and neuraminidase 1. The H1N1 subtype was responsible for the Spanish flu pandemic of 1918 and 2009 H1N1 pandemic.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D053118 · MeSH 2026。
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