On day 4 post infection with MCMV-HEL, no IL-17 production was found in HEL-specific CD4+ T cells in either nTg control mice or sTg-IRBP:HELhi mice (Fig. 5D), but these CD4+ T cells produced IFN-γ (Fig. 5D,E). This evidence concerns the gene IFNG and infection.