CD19scFv-CD22scFv-TM-4-1BB-CD3z CAR-T cells are generated with a lentivirus expressing CAR from normal human healthy donors. All cells are available at 1x10^6 to 1x10^7 cells in frozen vials, and shipped on dry-ice. For orders larger than >1x10^9, please inquire. CAR-T cells are cryopreserved in next-generation cryopreservation CS10 CryoStor medium (Sigma Aldrich, Catalog Number: C2874). All our cells are pathogen- and mycoplasma- free.