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Comparison of antibodies against RBD and IgG antibodies against N protein at the baseline and after each CoronaVac injection with convalescent serum from recovered COVID‐19 patients: seroconversion rate (A, C) and titer level (B, D). The red lines indicate GMC and 95% CI values. CI, confidence interval; COVID‐19, coronavirus disease 2019; GMC, geometric mean concentration; IgG, Immunoglobulin G; RBD, receptor‐binding domain
