以色列的数据很好 94% drop in symptomatic Covid-19 cases

Israeli study finds 94% drop in symptomatic Covid-19 cases with Pfizer
vaccine
PUBLISHED MON, FEB 15 20215:30 AM EST
Reuters
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Health maintenance organization (HMO) Clalit, which covers more than half of all Israelis, said the same group was also 92% less likely to develop
severe illness from the virus.
The comparison was against a group of the same size, with matching medical
histories, who had not received the vaccine.
http://www.cnbc.com/2021/02/15/covid-pfizer-vaccine-israel-study-finds-94percent-drop-in-symptomatic-cases.html