難說，WHO曾警告，曾檢測新冠陽性的未必免疫（保護性抗體)，跟年齡，體質，感染輕重等都有關。

來源: pickshell 於 2021-08-14 06:54:26 [舊帖] [給我悄悄話] 本文已被閱讀：次

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