IGHG3 and infection: Both before (Figures 1a–g) and after infection (Figures 2a–g), the two concentrations of the F1F3 chimera (100 and 200 μg) and the F3 vaccines promoted the highest IgA, IgM, IgG, IgG1, IgG2a, IgG2b, and IgG3 antibody absorbance values.