As expected, no Raji tumor burden progression was observed following infusion of 1 × 107 CD19 CAR T cells per animal, whereas mice receiving no treatment or rapamycin alone (0.1 mg/kg qMWF delivered by intraperitoneal injection) showed rapid tumor growth and developed tumor-associated symptoms requiring euthanasia within 12 days (Figure 5D). Here, CD19 is linked to neoplasm.