In this exclusive video, Harlan Krumholz, MD, director of the Center for Outcomes Research and Evaluation at Yale University and Yale New Haven Hospital in Connecticut, discusses a recent preprint he co-authored on distinguishing long COVID through immune profiling. Krumholz, a cardiologist, is also the Harold H. Hines, Jr. Professor of Medicine and a professor in the Institute for Social and Policy Studies at Yale School of Medicine.