按CDC的說法，實際感染為確診乘8，即64%了，所以已經接近群體免疫。疫苗接種是趕不上感染速度的。

來源: 周老大於 2021-02-02 10:11:35 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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