CD8A and pulmonary fibrosis: Although MAIT cells have never been assessed in pulmonary fibrosis, murine skin resident MAIT cells exhibit a distinct tissue repair transcriptional signature4, similar to H2-M3 restricted CD8+ T cells 68, and seen in TCR-activated MAIT cells in humans and mice 6,7,69, indicating their role in local repair similar to other tissue-resident cells.