CCR5 and infection: CCR5 genotypes wt/Δ32 and Δ32/Δ32 were identified in 3 of 11 patients (27.3%) with putative acquired non-R5 strains infection, and were not significantly more frequent than among patients with RHI harbouring R5 strains (5/35, 14.3%; p = 0.374).