Findings

What do systematic reviews say?

1 questions · 1 findings · 1 reviews

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

All‐cause mortalityb

It is very uncertain whether booster changes all‐cause mortalityb compared with placebo/no booster (very low certainty).

1 finding from 1 review

Efficacy and safety of COVID‐19 vaccines 2022 · Cochrane Headline outcomes only
RR 1.27 [0.52, 3.05]
1 study · 28254 participants
Very low