Whereas only a low proportion of blue CD3+ CD4+ CD8− cells was detected in PBMCs and CD4+ T cells following a mock infection (1.0% ± 0.4% and 0.5% ± 0.2%, respectively), mean rates of infection with HIV-BlaM were 27% ± 5% in PBMCs and 32% ± 7% in CD4+ T cells in the presence of DMSO (vehicle control) (Fig. 5B). Here, CD4 is linked to infection.