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Two combinations of CD19 and CD22 CAR T cell products as an example of combinations among different types of CAR T cells. (A) Cocktail infusion of CD19 and CD22 CAR T cells for addressing antigen-negative relapse. (B) Sequential infusion of CD19 and CD22 CAR T cells according to the in vivo activity of CAR T cells and patient status to overcome both short duration and antigen escape.
