Fig. 3: IgG responses to S protein peptides in vaccinated volunteers.

a IgG responses of vaccinated individuals against S protein peptides. FI, fluorescence intensity, was shown in log scale, i.e., log2(FI) ranges from 0 to 12. b Correlation coefficient between the peptide-specific IgG response and age. c Correlation coefficients for male and female. Each line represents one peptide.