The mixture of OT-I BRD7-deficient naive CD8+ T cells (CD45.2+) and OT-I BRD7 WT naive CD8+ T cells (CD45.1+CD45.2+) at a ratio of 1:1 was adoptively transferred into CD45.1 mice, followed by infection with PR8-OVA viruses after 24 hours. This evidence concerns the gene CD8A and infection.