Dr. John A. Mannick, MD, chair emeritus and former Chief of Surgery in the Department of Surgery at Brigham and Women's Hospital in Boston, Massachusetts, was a pioneer in transplantation immunology. This collection contains 1 oral history interview conducted on July 31, 2019 by Emily Stewart as part of the Dr. David Sabiston Oral History Project. In the interview, Mannick discusses his early life, educational background, his research and career, Sabiston's influence on the field of surgery, and his memories of Sabiston.