Boris Yoffe, MD is Professor of Medicine and Molecular Virology at Baylor College of Medicine. He is a member of the division of Gastroenterology and Hepatology. The research in his laboratory was focused on pathogenesis of virally induced liver diseases. In early years he also was involved in HIV research and his laboratory was one on the first to describe mechanism of immune dysfunction due to death by cytolysis of immune cells (CD4). His work with hepatitis viruses revealed role of hepatitis B extrahepatic infection in chronicity and recurrence of infection following liver transplantation.