Antibody responses according to vaccine groups.

P: Pregnant.NP: Non-pregnant.GMT: Geometric mean titer.GMR: Geometric mean ratio.CI: Confidence interval.Sero-protection: Titer ≥40.Sero-conversion: Pre titerSignificant increase: Pre titer ≥10, Post titer 4 fold Pre titer.Sero-conversion or significant increase: Percentage of total number of women in each vaccine group.†At day 0 GMT were the same in all groups (ANOVA, p = 0.51).‡The number of women with sero-protection did not differ in any of the groups compared over time (GEE).*GMT at 3 weeks, 3 months and 10 months were adjusted for baseline titer.