The study by Monceaux et al.[12] showed that the dynamics of CCR5-expressing CD4+ T cells in the acute phase of SIV-infection in Chinese RM are very similar to those in HIV-infected humans, which is characterized as a transient increase in the proportion of CD4 + CCR5+ T cells in the peripheral blood. Here, CD4 is linked to heterotaxy, visceral, 5, autosomal.