如果接觸人多，戴口罩沒障礙，最好裏麵KN95或N95，外麵加一層普通一次性外科口罩防護好些。我從疫情開始就是如此防護。

來源: 小小鴨於 2022-02-01 07:28:01 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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