Comparison of homing markers and chemokine receptors on NK-cell subsets in naive and SIV-infected macaques. Percentages of positive cells above background (CCR5, CCR6, CCR7, CD62L) and mean fluorescence intensities (CXCR3, CXCR4) were compared between naive and SIV-infected macaques for peripheral blood CD56⁺, CD16⁺, and DN NK subsets as shown in Figure 1. Horizontal bars indicate medians. Only significant P values are shown for naive versus SIV-infected comparisons. Mann-Whitney test; *P < .05; **P < .01; ***P < .001.