Glycoprotein-specific T-cell response measured by flow cytometry with intracellular cytokine staining (ICS) at different time points pre- and post-vaccination. CD4 T-cell response in all participants (A, n = 31 in the low dose group and n = 30 in the high dose group) and those with pre-existing adenovirus type-5 neutralising antibody titres ≤1:200 (B, n = 13 in the low dose group and n = 9 in the high dose group) or >1:200 (C, n = 18 in the low dose group and n = 21 in the high dose group), and CD8 T-cell response in all participants (D, n = 31 in the low dose group and n = 30 in the high dose group) and those with pre-existing adenovirus type-5 neutralising antibody titres ≤1:200 (E, n = 13 in the low dose group and n = 9 in the high dose group) or >1:200 (F, n = 18 in the low dose group and n = 21 in the high dose group). Proportions of glycoprotein-specific CD4 (G) and CD8 (H) cells that produce any combination of the three cytokines at day14 and day 28. TNF = tumour necrosis factor. IL = interleukin. IFN = interferon. Cases with undetected T cell response were not shown. The line at median with 75th percentiles (3rd quatile, Q3) were shown in the Figure.