Fig. 4From: COVID-19 vaccination efficacy in numbers including SARS-CoV-2 variants and age comparison: a meta-analysis of randomized clinical trialsThe efficacy of COVID-19 vaccines for preventing hospitalization and death related to COVID-19. a preventing hospitalization related to COVID-19; b preventing death related to COVID-19; #observation at least 14 days after vaccination; ##observation at least 28 days after vaccinationBack to article page