A trial found that J and J's vaccine was 66% effective at preventing moderate to severe cases of CO vid 19, and it was 100% effective at preventing hospitalizations 28 days after vaccination.
一項試驗發現,J和J的疫苗對預防中度至重度COvid 19的有效率為66%,對預防接種後28天住院的有效率為100%。