Fig. 4

Antibody titers pre-vaccination and post-vaccination for subgroup analysis by gender. A-C The geometric mean (95% CI) for antibody titers of A/H1N1, A/H3N2 and B/Victoria strain for males. D-F The geometric mean (95% CI) for antibody titers of A/H1N1, A/H3N2 and B/Victoria strain for females