IFNG and parasitic infectious disease: As IL-12 and IL-18 can induce IFN-γ from NK cells or previously stimulated T cells, we queried their role in induction of IFN-γ by MCMV, but did not find any effect of blocking IL-12 and IL-18 together in the time period before challenge on protection from P. chabaudi parasitemia or pathology by the MCMV vector (S5 Fig).