Seroprotection rate, seroconversion rate, and HAI GMT of 44 subjects at delivery.

Two subjects, P005 and P039, who did not deliver at the study site were not included in this analysis. Data presented as mean±standard deviation or number (percentage).a: Mc'Nemar exact test for the change of response over time.b: Comparison between Seroconversion rate and immunogenicity criteria of Committee for Proprietary Medicinal Products (CPMP) was analyzed by Binomial Exact test.c: Wilcoxon signed rank test for the change of HAI titer over time.*: statistically significant (pNote: Periods were defined as follows: 0–2 weeks, delivery within 20 days after vaccination; 3–4 weeks, delivery at day 21 to day 34; 5–8 weeks, delivery at day 35 to 63; >8 weeks, delivery day 64 or later.