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来源: 于 2021-02-01 06:03:53 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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?