理论的前提。
可恨的是某些疫苗代理商混淆概念,最开始说~95%保护率。
随着实际病例增多,改口说减少发病率。继而发展到防重症、减死亡。
直到在欧洲面对记者追问时,才承认:没有防感染的教据。
CDC是这样写的
COVID-19 vaccines help protect against severe illness, hospitalization and death. COVID-19 vaccines also help protect against infection.
如果否认防感染,何来breakthrough infections