IL18R1 and infection: Interestingly, at 21 days post-infection, we found that the transfer of ST2+IL-18Rα+ ILC resulted in higher proportions of ILCs in the lungs when compared to the conditions in which the same number of ST2+IL-18Rα− ILCs were transferred (Figure 1K); in addition, T-bet expression among ST2+IL-18Rα+ ILCs was significantly increased (Figure 1L).