CD4 and infection: Furthermore, we determined that adoptive transfer of naive CD4+ but not CD8+ T cells significantly reduced MF count at the site of infection (Figure 3A) and in the periphery (Figure 3B) on day 72 p.i. The significant reduction of MF on the analysis day was reflected during the course of infection and already at the onset of MF secretion in the periphery from day 56 p.i. (Figure 3C).