世衛組織說，根據大多數研究，既感染過新冠又接種過疫苗的人對嚴重後果有最好的保護

來源: heisse 於 2022-06-02 11:10:22 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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