Findings

What do systematic reviews say?

1 questions · 1 findings · 1 reviews · Emergency and Critical Care

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

Local reactogenicity events

Booster probably leads to higher local reactogenicity eventsf compared with placebo/no booster (moderate certainty).

1 finding from 1 review

Efficacy and safety of COVID‐19 vaccines 2022 · Cochrane Headline outcomes only
RR 6.46 [3.18, 13.13]
1 study · 119 participants
Moderate