Xenotransplantation, or the exposure ex vivo or in vivo of human cells or body fluids to living non-human cells, is currently under preclinical and clinical investigation. The long-term goal of using non-human animals to provide a steady and sufficient supply of organs for human transplatation still faces challenges. This volume provides a review of both the immunologic and infectious disease issues that will need to be addressed before xenotransplantation of organs becomes a reality. Book jacket.