Fig. 4

Comparison of antibody responses between Sinopharm BBIBP-CorV vaccine and Janssen/Ad26.COV2.S. Graph A shows the percentage of inhibition of neutralizing antibodies. The concentration of IgG is represented in graph B. Graph C shows the proportions of people having neutralizing antibodies and graph D represents the proportions of participants having IgG antibodies. Mann–Whitney Rank Sum test was used for the comparison of antibodies levels and neutralization capacity, and Fisher exact test for the comparison of percentage participants with IgG and neutralizing antibodies between two groups