疫苗能抵抗的都是已經不危險了的流感，危險的都是變異了的，對這些疫苗就不起作用了。

來源: edison11 於 2012-10-06 12:14:03 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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