Findings

What do systematic reviews say?

1 questions · 1 findings · 1 reviews

No studies found 0 · 0%GRADE not reported 0 · 0%Very low 0 · 0%Low 0 · 0%Moderate 1 · 100%High 0 · 0%

Serious adverse eventsb

AD26.COV2.S – Janssen Pharmaceutical Companies showed no clear difference in serious adverse eventsb compared with placebo (moderate certainty).

1 finding from 1 review

Efficacy and safety of COVID‐19 vaccines 2022 · Cochrane Headline outcomes only
RR 0.92 [0.69, 1.22]
1 study · 43783 participants
Moderate