Chemokines such as C-X-C Motif Chemokine Ligand 9 (CXCL9) and CXCL10 stimulate T cell trafficking and infiltration into the tumor, where T-cell-mediated cytotoxicity liberates more tumor-associated antigens to further propagate the cancer-immunity cycle (4, 5, 8). The gene discussed is CXCL9; the disease is cancer.