 The donor derived CMV-CTL cells will be transfused into the patients intravenous line. The patients will receive the dose of CMV-CTL cells when they are sero-positive for CMV-DNA 30 days after transplant. The CMV-DNA levels will be monitored weekly for at least 60 days after the transplant. If after the initial dose of CMV-CTL cells the patient develops a viral infection, then they may be eligible to receive one additional injection of CTLs. If the CMV levels in the blood continue to rise after the dose of T cells then the patient will receive treatment with Ganciclovir, Foscarnet. 