Fig 5.

Association between serum and breast milk (BM) antibody levels in post-partum women immunized with Adacel Tdap. Correlation analysis of peak serum and breast milk IgG antibody titers (0.5 months post-partum) against Tdap antigens: (A) PT, (B) PRN, (C) FHA, (D) DT, and (E) TT. In-picture plots magnify data points and correlation at the lower end of the scale. DT, diphtheria toxoid; FHA, filamentous hemagglutinin; PRN, pertactin; PT, pertussis toxin; TT, tetanus toxin. P value and r = Spearman correlation are indicated.