As for CD4+ T cells, at day 6 post-infection, a remarkable decrease in CD4+ T cell apoptosis was noted in BALF (6.17% vs. 12.47%, p = 0.004) and BM (2.82% vs. 16.69%, p = 0.004) in CD11b-shArg2-mCherry mice, enabling increased CD4+ T cell proportions from 4.33% to 13.10% (p < 0.001) in BALF and from 2.66% to 9.24% (p = 0.001) in BM (Figure 6, I and J). This evidence concerns the gene CD4 and infection.