Fig. 2.

Serologic response after COVID-19 vaccination. The seroconversion rates after one dose (A), two doses (B) or three doses (C) of COVID-19 vaccine were plotted. The solid circles indicates the seropositivity rates, and the horizontal lines mean the 95% confidence interval (CI). The diamonds indicate the pooled estimate, and the lateral tips of the diamonds mean the 95% CIs. The event rate, lower limit, upper limit and relative weight were analyzed using the random effects models. The heterogenicity of each subgroup was represented by Q, I² and P values as described in Methods