MKI67 and infection: Ki-67 expression was lower post-ATI than during primary infection, both in W4- and W24-treated animals (Fig. 5E, F), but overall higher levels of proliferating CD8+ T cells were found early post-ATI in the W4-treated macaques than in the W24-treated macaques in blood (p = 0.004) (Fig. 5F) and PLNs (p = 0.009) (Fig. 5G).