CD4 and infection: Analysis of viral GFP in each MAIT cell subpopulation showed that HSV-1 could infect CD8+CD4– MAIT cells (mean 10.6% GFP+, range 6.4%–15.4%), CD4+CD8– MAIT cells (mean 16.7% GFP+, range 11.3%–30.8%), CD8–CD4– MAIT cells (mean 11.7% GFP+, range 7.1%–15.7%), and CD8+CD4+ MAIT cells (mean 15.1% GFP+, range 6.0%–34.8%; Fig. 3A), with a trend toward a higher percentage of infection in CD4+CD8– compared to CD8+CD4– MAIT cells (P = 0.0845; Fig. 3A).