Fig. 3From: Emerging biomaterials for tumor immunotherapySchematic diagram of ACT for cancer. A Mechanisms of NK cell cytotoxicity against tumors. (Reproduced with permission from [47] Copyright © 2021, Frontiers in Oncology) B. Schematic diagram of the basic steps of NRT immunotherapy. (Reproduced with permission from [53] Copyright © 2021, Medcomm) [53]Back to article page