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 1 · 100%Moderate 0 · 0%High 0 · 0%

Systemic reactogenicity events

Booster showed no clear difference in systemic reactogenicity eventsf compared with placebo/no booster (low certainty).

1 finding from 1 review

Efficacy and safety of COVID‐19 vaccines 2022 · Cochrane Headline outcomes only
RR 1.8 [0.71, 4.56]
1 study · 119 participants
Low