To circumvent this problem, we compared patients with CR with those without CR, stratified according to the CD4 cell counts, that is, (i) patients with AIDS without CR (exhibiting CD4 ≤ 800 cells/mm3; 4 to 778 cells/mm3, median = 215) versus patients with AIDS and CR (exhibiting CD4 ≤ 368 cells/mm3; 1 to 368 cells/mm3, median = 31) and (ii) patients with AIDS without CR (exhibiting CD4 ≤ 100 cells/mm3; 4 to 99 cells/mm3, median = 49) versus patients with AIDS and CR (exhibiting CD4 ≤ 100 cells/mm3; 1 to 90 cells/mm3, median = 29). This evidence concerns the gene CD4 and AIDS.