CD4 and malaria: Although the IFN-γ MFI values for CD4 MFT cells from BCG immunized mice were not effected at 7 and 10 weeks after the malaria challenge, the extent of IFN-γ expression in triple-positive CD 4 T cells was reduced 60% in the malaria infected, BCG vaccinated animals compared to the BCG vaccinated controls at 2 weeks post P. yoelii challenge (Figure 6).