Paul A. Offit, MD, is a pediatrician specializing in infectious disease medicine, an internationally known expert on vaccines, immunology, and virology, the Maurice R. Hilleman Professor of Vaccinology, Professor of Pediatrics at the University of Pennsylvania, Chief of the Division of Infectious Diseases, and the Director of the Vaccine Education Center at The Children's Hospital of Philadelphia. Dr. Offit has been a member of the Centers for Disease Control's (CDC) Advisory Committee on Immunization Practices. Dr. Offit has published more than 120 papers in medical and scientific journals in the areas of rotavirus-specific immune responses and vaccine safety and is the co-inventor of a rotavirus vaccine recently recommended for universal use in infants by the CDC. Offit is the co-author of three books, entitled Vaccines: What You Should Know (2003), Breaking the Antibiotic Habit (1999), The Cutter Incident: How America’s First Polio Vaccine Led to Today’s Growing Vaccine Crisis (2005), and Vaccinated: One Man's Quest to Defeat the World's Deadliest Diseases (2007).