IFNG and influenza: While more NP-specific TRM cells were recovered from the lungs of NK-deficient WT mice (although not statistically significant) compared to NK-sufficient WT controls (Fig. 7C), elevated TRM numbers were again not observed in the lungs of IFN-γ−/− mice, regardless of NK depletion (Fig. 7C), indicating that TRM formation in the lung following influenza infection occurs independent of both global and NK cell-derived IFN-γ.