For that, muMT (CD45.2) and WT (CD45.2 and CD45.1) mice were infected and, at 9 Dpi, CD4+ T cells were purified from the spleen of CD45.2 WT or CD45.2 muMT mice and adoptively transferred to infection-matched CD45.1 WT mice as schematized in Figure 8A (WT + WT and WT + muMT, respectively). Here, CD4 is linked to infection.