CD4 and type 2 diabetes mellitus: CD4+CD25+CD127dim/− Tregs proportion within CD3+CD4+ T cells was significantly elevated in both T2DM group (5.41 ± 1.37%) and CHB group (5.75 ± 1.38%) compared with the control group (4.63 ± 1.27%) (p < 0.05, Figure 1B).