疫苗一般是失活的病毒，接種到人體後引起人體自身的免疫反應，根本在人體內呆不了多久就被清理了。

來源: mingxiaot 於 2018-10-11 12:47:30 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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