Five days post-infection (pi), 50 and 47% of thecells were productively infected by HIVLAI and HIVNL-AD8respectively (as monitored by intracellular Gag-p24 FACS-staining (not shown)).Infected cells were then co-cultured with HIV-specific CTL lines and T cellactivation measured using IFNγ-ELISpot assays (Figure 2). This evidence concerns the gene IFNG and infection.