Normal donors fulfilling these criteria who consent to donate blood for the generation of CMV-specific T-cells for adoptive therapeutic purposes will receive a detailed clinical evaluation, including a medical history, physical examination, and serologic testing for transmissible diseases within 1 week of donation including hepBs Ag and hepatitis C antibody, HIV-1 and 2, HTLV-1 and 2, CMV (only if previously negative), VDRL, WNV, and Chagas An HIV+ donor will be rejected on medical grounds. Donors must have Hgb value > 10 gm/dl and must be capable of undergoing a single 3-6 unit leukapheresis (preferable) or a single unit of blood for T cells (for pediatric donors, no more than 5 ml/kg at any one blood draw).