CD4 and dental caries: Of note, the remaining nine traits (plasmacytoid DC [pDC] % DC, IgD−CD38− % B cell, CD39+ activated Treg % CD4 Treg, CD39+ secreting Treg % CD4 Treg, resting Treg % CD4, activated & resting Treg % CD4+, IgD− CD38dim % lymphocyte, activated & resting Treg % CD4 Treg and CD39+ resting Treg % resting Treg) reduced the incidence of dental caries (OR < 1, P < 5.0E-02).