This analysis revealed significant between-group differences in CD64 expression involving both intermediate monocytes (Fig. 3A, p<0.005) and non-classical monocytes (Fig. 3B, p<0.03), indicating that although effective ART was associated with reduced CD64 expression compared with viremic infection, levels were not normalised to those seen in the healthy control group. This evidence concerns the gene FCGR1A and infection.