疫苗的效果會隨時間遞減，裏麵根本沒提最後一針是什麽時候的事。如果已經打了一年，效果就微了。

來源: 原上草2017 於 2023-02-07 05:51:13 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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