個人有各自的風險。比如大家庭，有老弱基礎病的，需要比健康的青壯年大眾更加小心。

來源: 40er 於 2020-03-02 09:38:27 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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