FOXP3 and infection: Remarkably, numbers of T cells as well as of FOXP3+ regulatory T cells (Tregs) increased by more than twofold as early as 6 days following CCUG 30485 strain infection (p < 0.005 and p < 0.05, respectively; Fig. 3a, b), whereas the T cells declined thereafter to a still elevated level (p < 0.05; Fig. 3a).