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来源: dudaan 于 2021-02-01 06:03:53 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (727 bytes)
本帖于 2021-02-01 06:19:50 时间, 由普通用户 dudaan 编辑

The reported efficacy rates of 94 or 95 percent are for symptomatic disease only. Because the clinical trials for Pfizer and Moderna did not require regular testing for COVID-19, they were not a good indication of how well the vaccine protects against asymptomatic disease (which account for some 40 percent of cases).

https://www.ucsf.edu/news/2021/01/419691/covid-19-vaccine-fact-vs-fiction-expert-weighs-common-fears?

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