人群中打疫苗56%，感染中打疫苗者占74%。不成比例，咋解释？

来源: 阅后发于 2021-07-30 11:29:46 [旧帖] [给我悄悄话] 本文已被阅读：次

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人群中打疫苗56%， 感染中打疫苗者占74%。不成比例，咋解释？