Research into xenotransplantation has been caused by the previously mentioned need for organ transplants around the world. According to a 1999 survey of international registries worldwide, over 600,000 patients had received organ transplants (Ringe et). The overall results have been very successful, and this part has led to the increased demand. Xenotransplantation seems like a perfect solution to the dilemma plaguing many humans worldwide. Xenotransplantation could provide an unlimited number of healy animal organs capable of transplantation into humans. However, there are several serious consequences resulting from xenotransplantation which has prevented much clinical testing. Risks to the patient, including rejection and side-effects,
