The patient will continue to be followed in the BMT clinic after the injection. They will be seen in the clinic, in the hospital or contacted by the research nurse and have blood tests (to monitor the blood counts, the kidney and liver function and to monitor for viruses) weekly for the first 60 days after the CTL infusion, then at 3, 6, 9 and 12 months. To learn more about the way the T cells are working in the body, an extra 20-40 mls (4-8 teaspoons) of blood will be taken before the infusion and then 24 hours after the infusion (optional depending on the patients preference), and then at 1, 2, 4 and 6 weeks after the infusion. After this, blood will be taken every 3 months for 1 year. The amount of blood taken in the first 12 months will be 260-460mls (1-2 cups). Total time participation for this study will be 1 year.