CDC layman's language 用風險高多少倍來表示
https://covid.cdc.gov/covid-data-tracker/#rates-by-vaccine-status
越到後來防感染越差,但還是有一點
1.5 x => 防感染保護率:1 - 1/1.5 = 33%
紐約的數據出奇的好,據說用了什麽age-adjusted method
https://covid.cdc.gov/covid-data-tracker/#rates-by-vaccine-status
越到後來防感染越差,但還是有一點
1.5 x => 防感染保護率:1 - 1/1.5 = 33%
紐約的數據出奇的好,據說用了什麽age-adjusted method