Macrophages from HICs have low susceptibility to HIV-1 infection. (A) Kinetics of HIV-1 BaL replication after infection of MDMs from one representative HD (triangles) and one HIC (circles). Means ± SDs of 3 independent infections are shown. (B) HIV-1 replication on day 10-11 after infection in MDMs from HICs and HDs, after challenge with HIV-1 BaL. Symbols represent the average (n = 3 independent infections) p24 values detected in culture supernatants for each donor. Horizontal lines indicate median values.