Also, a decrease in the fractions of APO2.7-positive HIV-1-infected CD4+ T cells was observed in tissues infected with HIV-1BaL from 13.0±1.3% to 8.8±1.3% and from 5.7±1.0% to 4.1±1.1% of CD8− p24gag+ T cells on day 6 and 9 post infection, respectively (n = 6, p<0.05) (Figure 5B). This evidence concerns the gene CD4 and infection.