HIV-1 replication in HIV-1 infecetd CEM cells co-infected by HSV-1 or HSV-2. HIV-1 RNA has been quantified in the supernatant of CEM cells every 24 h up to 72 h following superinfection by HSV-1 (A) or HSV-2 (B) at an MOI of 1 (dark grey), 0.1 (light grey) and 0.01 (white). Cells not superinfected are represented in black. Values are expressed in log10 copies/ml. Data are representative of three independent experiments.