高峰是4，5月一次。流感與冬天有關，南北半球各一次，所以是六個月。新冠一年四季都在，未必會是六個月

來源: 周老大於 2022-02-17 08:55:27 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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