对老年组的有效保护率为42.3%，不符合FDA和WHO的标准

https://www.politico.com/news/2021/02/24/fda-johnson-johnson-single-dose-shot-covid-471327

The vaccine showed 42.3 percent overall efficacy in people over 60 with other health risks — such as obesity, heart problems and high blood pressure — which is lower than the FDA’s 50 percent bar for authorization.

 

 

真搞不懂，有些人为啥坚持要打jj。