CD4 and infection: Increased numbers of CD4+ and CD8+ naïve (CD4+CD44lowCD62Lhigh and CD8+CD44lowCD62Lhigh, respectively) as well as CD4+ and CD8+ memory/effector (CD4+CD44highCD62Llow and CD8+CD44highCD62Llow) T cells were detected at weeks 2 and 8 after infection (Figure 6A, 6B, 6C, 6D).