可歎！打疫苗的目的是什麽？防傳染?Delta之後已經不防感染了。防重症？嬰兒有多少重症？

來源: 周老大於 2022-02-02 17:09:50 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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