Figure 1.

Antibody responses following CoronaVac vaccination in SARS-CoV-2-naïve (blue) and -recovered (red) individuals. (A) Study design showing the blood collection timepoints. (B) Kinetics of anti-nucleocapsid (N), anti-spike (S), and anti-RBD IgG antibodies in vaccinated (naïve, recovered, and average) individuals. The cut-off for samples to be considered positive was ≥1.1 and the borderline zone ranges from 0.8–1.1 (horizontal gray bars). Statistics were calculated using Kruskal–Wallis test. (C) Comparison between timepoints after first (T2) and second dose (T3) in naïve and recovered individuals using the unpaired Mann–Whitney test. * p < 0.05, ** p < 0.01.