應該是：與帶病毒的人近距離接觸時，戴口罩，即使不是N95, 能不能顯著降低被感染概率。

來源: 欲千北於 2020-11-10 17:31:11 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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