EGFR and glioblastoma: have developed a strategy to “backpack” large quantities of IL‐15 superagonist complex (IL15‐sa) in the form of carrier‐free protein NGs on CAR‐TCs specified to target epidermal growth factor receptor (EGFR) in a human glioblastoma mouse model.[98c] The NGs would be able to selectively release the protein in response to TC receptor activation.