Chemokine receptor expression on (virus-specific) CD8⁺ T cells in the PB and LNs. (A) Representative dot plots of CCR7 and CX3CR1 staining on total (n = 15), CMV-specific (n = 10, 5 donors were analyzed with 2 different tetramers), EBV-specific (n = 7, 4 donors were analyzed with 2 tetramers and 2 with 3 tetramers), and FLU-specific (n = 5) CD8⁺ T cells. Comparison of percentages of CX3CR1-expressing (B), CCR7-expressing (C), and CXCR3-expressing (D) cells within total and CMV-, EBV-, and FLU-specific CD8⁺ T cells between PB and LNs. All panels represent from left to right: total, CMV-, EBV-, and FLU-specific CD8⁺ T cells. Paired samples were analyzed using the Wilcoxon signed-rank test.