FIG. 1.

Selective expansion of Tregs during HIV-1 infection and progression (a). Gating of CD4 and CD8 T cells (top) and expression of Tregs from representative UI and FP (bottom). (b). Comparison of Tregs in three groups of MACS participants. Bars represent medians. (c). Percentage of Tregs is inversely correlated with the percentage of CD4⁺ T cells in FP. (d). Absolute numbers of Tregs are positively correlated with the CD4⁺ T cell counts in FP and SP. Solid line, regression line for the FP. Dotted line, regression line for the SP.