當然，疫苗+口罩和社交距離防護效果會更好。

來源: pickshell 於 2021-08-17 18:50:56 [舊帖] [給我悄悄話] 本文已被閱讀：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.

當然，疫苗+口罩和社交距離 防護效果會更好。