去年初打过两针covid疫苗，一直戴N95,至今未染. 春末要有一周室内不能戴口罩的情况，请建议预防措施。

来源: seabreeze66 于 2023-02-18 06:47:36 [旧帖] [给我悄悄话] 本文已被阅读：次

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