Paul A Offit MDPaul A. Offit is an author and a pediatrician specializing in infectious diseases and an expert on vaccines, immunology, and virology. He is the co-inventor of a rotavirus vaccine that has been credited with saving hundreds of lives every day.He is the Maurice R. Hilleman Professor of Vaccinology, professor of pediatrics at the Perelman School of Medicine 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. He has been a member of the Centers for Disease Control and Prevention's advisory committee on immunization. Read More Read Less