CD4 and infection: Interestingly, the frequencies of CD25+ in CD4 T cells were comparable between VSVΔG-NP-inoculated and control mice, while the population of CD25− in CD4 T cells was significantly reduced at 42 dpi in the VSVΔG-NP-inoculated mice compared with mock controls (Fig. 6B), suggesting this population may be targeted by the rVSV infection.