Study Evaluating the Efficacy and Safety With CAR-T Immunotherapy for CD19 Positive Lymphoma

This open, single-arm,multicenter 2 phase clinical study will treat the patient who have CD19 positive lymphoma with an infusion of the patient's own T cells that have been genetically modified to express a chimeric antigen receptor(CAR)that will bind to tumour cells modified to express the CD19 protein on the cell surface. The study will determine if these modified T cells help the body's immune system eliminate tumour cells .The trial will also study the safety of treatment for CAR-T, how long CAR-T cells stay in the patient's body and the impact on this treatment for survival.