Her research focuses on the natural history and treatment of hepatitis B and C, and the prevention of liver cancer. Her research is funded by the National Institutes of Health, federal and private foundations, and various pharmaceutical companies. She has published more than 600 papers on viral hepatitis and liver diseases and is the co-author of five editions of the American Association for the Study of Liver Diseases Association Guidelines on Hepatitis B. She was one of the top 1% most cited scientists in the world for the decade 2002-12. She has trained more than 60 fellows and junior faculty from all over the world, some of whom have risen to the ranks of full professors and directors of liver programs in their home country. She received a Distinguished Mentor Award from the Michigan Institute of Clinical and Health Research in 2012, an Inspirational Physician Award from the American Medical Association in 2014, and a Distinguished Mentor Award from the American Gastroenterological Association in 2022. She was inducted into the Clinical Excellence Society in the Department of Internal Medicine in 2013.