CD19 and neoplasm: In the CD19 CAR-T mouse (ID #139), the Panc-1 tumors invasively grow in the whole lung, partial liver, pancreas, and kidney, whereas no tumor nodules were observed in the B12(VHH)-CAR-T mouse (#137) nor C4(VHH)-CAR-T mouse (#153) at week 10, suggesting potent persistence CAR-T activity in vivo (Fig. 5h).