Fig. 3

Forest plot analysis for the association between vaccine doses and 28 day mortality according to subgroups. Comparison of odds ratios of 28 day mortality between different subgroup based on vaccine doses. Age and body mass index were stratified according to median of the total population. A Received one dose of vaccine vs. did not receive vaccine. B Received two doses of vaccine vs. did not receive vaccine. C Received at least three doses of vaccine vs. did not receive vaccine. D Received two doses of vaccine vs. receive one dose of vaccine. E Received at least three doses of vaccines vs. receive one dose of vaccine. F Received at least three doses of vaccines vs. receive two doses of vaccine