David Fajgenbaum, MD, MBA, MSc, is a graduate of Georgetown University, the University of Oxford, the University of Pennsylvania, and the Wharton School. An assistant professor of medicine at the University of Pennsylvania and the associate director for the Orphan Disease Center, he is cofounder and executive director of the Castleman Disease Collaborative Network, as well as the cofounder of the National Students of Ailing Mothers and Fathers Support Network. Dr. Fajgenbaum has been recognized with multiple awards, including the Forbes “30 Under 30” for healthcare and the RARE Champion of Hope Award for science. He has been profiled by major media outlets such as The New York Times, Forbes, Science, Reader’s Digest, and the Today show. He lives in Philadelphia with his wife, Caitlin, and their daughter, Amelia.