Immunophenotyping of splenic mononuclear cells - On day 10 post-infection, there were no significant differences in the percentage of IL-10-producing CD4+ (Fig. 4A) or CD8+ T lymphocytes (Fig. 4C), nor in the percentage of IFN-γ-producing CD8+ T lymphocytes (Fig. 4D). Here, IL10 is linked to infection.