|  | A physician who lived across the street from the young John  McDonald in Baldwyn, Mississippi  inspired him to pursue a career in medicine. McDonald originally thought he  would work as a family physician, but a conversation with his mentor, Dr. John  Stewart, led him in a different direction. At Stewart’s suggestion,  McDonald completed a two-year fellowship in immunology, preparing him for a  career in the relatively new field of organ transplantation. McDonald’s interest in skin allografts, histocompatibility,  homotransplantation, and human leukocyte antigen determined the path of his  laboratory research. Data from these studies was reported in the scientific  literature and at professional meetings. An interest in the creation of organ  sharing networks resulted in grants from state and national agencies.      Over the years, McDonald made significant contributions to  organ transplantation and organ sharing, both in the laboratory and in the  operating room. His leadership roles in professional organizations, associations, and societies provided an opportunity to  disseminate his ideas and findings through lectures and addresses. As his  prestige as a scientist, surgeon and leader increased, so did the requests to  serve as a visiting professor and  invited lecturer.      His research efforts have resulted in numerous awards and  honors. In 1988, he was the  recipient of an honorary Doctor of Science degree  from his alma mater, Mississippi College,  “in recognition of his significant achievements in the field of medicine and in  appreciation for his notable contributions to medical research.”   |