Dr Ype de Jong is an Assistant Professor of Medicine at the Sanford I. Weill Medical College of Cornell University and an Attending Physician, New York-Presbyterian Hospital Cornell campus. He joined the faculty after completing his Internal Medicine and Gastroenterology training at Mount Sinai Hospital, New York. In his patient practice Dr. de Jong's interests include viral hepatitis, Primary Biliary Cirrhosis, and Non-Alcoholic Fatty Liver Disease as well as liver disease associated with Inflammatory Bowel Disease. In addition he is trained in general Gastroenterology, including endoscopy and colon cancer screening. His research interests are geared to better understanding how hepatitis viruses can evade the immune system and are able to chronically persist in a subset of those infected. To this end he is working on developing new models for hepatitis C virus infection in the basic science arm of the Center for the Study of Hepatitis C at The Rockefeller University.