<qa>  How long will 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, an extra 40 mls8 teaspoonfuls of blood will be taken at these visits. Additionally, 3 mls 12 teaspoonful of blood will be taken prior to the infusion and monthly thereafter to conduct a CBC a test to look at the components of the blood. 