|
此文章由 W安安 原创或转贴,不代表本站立场和观点,版权归 oursteps.com.au 和作者 W安安 所有!转贴必须注明作者、出处和本声明,并保持内容完整
bestgardens 发表于 2021-9-1 21:51 ![](static/image/common/back.gif)
To or by ?
Pfizer's CEO says COVID jab effectiveness drops to 84% after 6 mths.
https://www.cnbc.com/2021/07/28/ ... ter-six-months.html
Below is another data sources:
The Pfizer-BioNTech vaccine was initially 88% effective at protecting against Covid-19 infection a month after the second dose, but this fell to 74% after five to six months, an analysis from the Zoe Covid study found.
The real world study, which used positive Covid-19 test results from 1.2 million people in the U.K., found a similar decline in the protection offered by the AstraZeneca vaccine, which fell from 77% a month after the second jab to 67% after four to five months.
https://www.forbes.com/sites/rob ... ta/?sh=6e1aafbb5a80
|
|