<qa>  How long does the T cells last in the body?To learn more about the way the T cells are working and how long they last in the body, 40 mls 8 teaspoonfuls of blood will be taken once before the injection of T-cells, every two weeks for 6 weeks after the injection, monthly for 3 months and then every 3 months for 1 year. This amount of blood will be less for small patients. We will also take another blood sample from the patient if relapse is suspected. Each patient will need to have a physical examination by their physician to check on their progress. 