群體免疫的意義就是看運氣。其實每年的流感也一樣。當然出門小劑量的感染一點說不定就免疫了呢，都說不準

來源: Tove 於 2020-04-10 13:08:27 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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