有新變種不斷出現，所以應該和流感疫苗一樣，年年打。本人就是因為今冬沒有打疫苗，最近才第一次感染新冠。

來源: FollowNature 於 2023-12-12 10:00:00 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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