Few influenza-specific CD8 T cells are detectable in PBMC following vaccination of pregnant women.

<p>(A) Frequency of influenza-specific tetramer-reactive CD8 T cells among total CD8 T cells. (B) Percentages of CD38⁺ HLA-DR⁺, (C) Ki-67⁺, and (D) Granzyme B⁺ among tetramer-reactive CD8 T cells. Horizontal lines indicate median values. P values are determined by Wilcoxon matched-pairs signed rank test.