CD8A and neoplasm: To harness this potential, we sought to deploy these effector/memory CD8+ T cells to the lungs to proactively prevent lung metastasis, an approach that has never been successfully attempted owing to its dependence on often poorly defined tumor antigens.[61] Intriguingly, intranasal nanoSTING@Mn was found capable of pulling antigen‐primed T cells into the lung in an antigen‐independent manner, opening a new avenue for metastasis prevention.