Manni S, Iaffaldano L, Quadraccia MC, Aurigemma M, Guercio M, De Falco P, Sarcinelli A, De Ioris MA, Quagliarella F, Rosignoli C, Merli P, Becilli M, Del Bufalo F, De Angelis B, Locatelli§ F, Quintarelli§ C. CD19 antigen: from tumor target to safety switch in CAR-T cell therapy. Haematologica; https://doi.org/10.3324/haematol.2026.301013 [Early view].