整體效果很好啊，今年春假，老年人感染率和死亡率大大降低，反倒是那些輪不到打疫苗的中年人感染率大增

來源: 紫色海洋於 2021-05-18 08:54:32 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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