However, for the entire CD8+ cell subpopulation, the cytotoxic effect of MAIT is not outstanding (Figure S3F, Supporting Information), unlike those effector (c0), exhausted (c3), or NK‐like CD8+ T cells (c1 and c5), and the occurrence of MAIT cells suggest they serve as the vanguard of anti‐tumor CD8+ cells in this region. This evidence concerns the gene CD8A and neoplasm.