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来源: Lifehere 于 2020-03-17 15:08:19 [] [旧帖] [给我悄悄话] 本文已被阅读： 次 (1115 bytes)

The swine-origin influenza A (H1N1) virus that appeared in 2009 and was first found in human beings in Mexico, is a reassortant with at least three parents.

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