新冠。相對於其他國家，美國的防疫措施很鬆，疫苗以前基本上是依靠全民免疫。

來源: Porcelana 於 2023-04-18 17:35:43 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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