DbLT359-specific CD8 T cells were equivalent in frequency, KLRG1 and CD127 (interleukin 7 receptor alpha [IL-7Rα]) effector memory phenotype, and production of gamma interferon (IFN-γ) between Retro-2.1- and vehicle-treated mice in both acute (day 8 p.i.)and persistent (day 30 p.i.)phases of infection (Fig. 4C to E). This evidence concerns the gene IFNG and infection.