Fig. 3From: The efficacy and effectiveness of COVID-19 vaccines around the world: a mini-review and meta-analysisThe overall Effectiveness of studied COVID-19 vaccines after the second dose. The overall Efficacy of COVID-19 vaccinesThe overall Efficacy of the first dose of the vaccines evaluated in our study was 81% (95% CI 0.70, 0.91) (Fig. 4)Back to article page