Animals in which Nectin-4 TRAAC treatment led to tumor clearance were protected from tumor growth upon rechallenge, demonstrating that Nectin-4 TRAAC induces potent anti-tumor immunological memory. Conclusions The preclinical data shown here provide a strong rationale for pursuing Nectin-4 TRAAC for the treatment of Nectin-4-expressing solid tumors, including those that are refractory to CPI therapy.