FFAR3 and infection: Consistent with our findings following epicutaneous infection, expansion of gB498-505-specific CD8+ T cells in the blood was similar between WT and Ffar2–/–;Ffar3–/– mice (Figure 2B), but CD8+ T cell differentiation in the latter was significantly skewed away from MPEC differentiation and towards SLEC phenotype (Figure 2C).