Fig. 4
From: SARS-CoV-2 vaccine breakthrough infection in the older adults: a meta-analysis and systematic review
Egger test of publication bias of the included studies on prevalence
Fig. 4 | BMC Infectious Diseases
From: SARS-CoV-2 vaccine breakthrough infection in the older adults: a meta-analysis and systematic review
Egger test of publication bias of the included studies on prevalence