Nanocarriers include liposomes, polymersomes, peptide nanodrugs, or even metal‐based nanoparticles and they allow specific systemic delivery of compounds into the tumor bed without the need for IT administration.[106] Namely, the use of a biopolymer containing a STING agonist (cdGMP) and NKG2D‐CAR‐T cells was placed directly on a mouse pancreatic tumor, effectively delivering CAR‐T cells into the tumor bed to eradicate tumor cells. Here, KLRK1 is linked to pancreatic neoplasm.