Masking is a key!

來源: 老地雷於 2022-01-11 21:18:13 [檔案] [博客] [舊帖] [給我悄悄話] 閱讀數 : (0 bytes)

回答: Covid loses 90% of ability 2 infect within 5 minutes in air 由移花接木於 2022-01-11 07:31:28

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