疫情之前我看了好长时间各国的人口金字塔。印度没有达到群体免疫，只是孟买的贫民区达到了群体免疫。

来源: solo1 于 2021-01-02 15:11:39 [旧帖] [给我悄悄话] 本文已被阅读：次

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