CD7 and acute lymphoblastic leukemia: Using CRISPR/Cas9 to disrupt both CD7 and T‐cell receptor α constant (TRAC) locus, one study generated “fratricide‐resistant, allo‐tolerant” CAR‐T cells targeting CD7, which could eliminate T‐ALL cells without developing GvHD.[19] In addition to allogeneic T cells, NK cells can also be used as an alternative cell source to solve the problem.