Figure 3. Anti-HBs IgG subclasses in paired mother-infant sera.

1, 2, 3, and 4 under the X axial indicate the subclasses IgG1, G2, G3, and G4, respectively. Sera 018 and 020 were from mothers recovered from natural HBV infection, while sera 141 and 166 were from vaccinated mothers. The data from 4 paired sera were used to represent anti-HBs IgG subclasses distribution in 20 paired mother/infant sera.