Figure 4.

SARS-CoV-2–specific memory T-cell responses and relationship with incident infection. (A) There was no significant difference in SARS-CoV-2–specific memory T-cell responses at day 14. P-values calculated by Wilcoxon signed-rank test compared to pre-vaccine responses. (B) There was no significant differences in the day 14 memory T-cell responses between those who developed infection and those who did not develop infection. P-values calculated by Mann–Whitney U test. Bars represent median and interquartile range. S, spike; N, nucleocapsid; SFU, spot-forming unit; PBMCs, peripheral blood mononuclear cells; ns, not significant.