Dr. Marshall received his medical degree from Vanderbilt University in 1983 and completed a pediatric residency there in 1986. He then went to the Children’s Hospital of Philadelphia for fellowship training in infectious diseases. In 1989, he joined the University of Louisville Department of Pediatrics, where he is now Professor of Pediatrics and Chief of the Division of Pediatric Infectious Diseases. Dr. Marshall serves as an attending physician at Norton Children’s Hospital and sees patients in the infectious diseases clinic. He has been recognized as an astute clinician/educator, a productive investigator, and an effective administrator, receiving, among other awards, the Outstanding Clinical Professor and Educator of the Year Awards from the Department of Pediatrics, the Distinguished Educator Award from the School of Medicine, and the Educational Achievement Award from the Kentucky Medical Association. In 2018, Dr. Marshall received the Plotkin Lecture in Vaccinology Award from the Pediatric Infectious Diseases Society for “contributions to the field of vaccinology or areas of related science that have impacted the lives of children and the specific area of pediatric infectious diseases.” Under Dr. Marshall’s leadership, the Division of Pediatric Infectious Diseases has repeatedly been recognized for excellence in teaching and patient care. Dr. Marshall is a member of numerous academic societies and has served in several national leadership positions. He is credited with over 190 publications and is best known for his work in vaccine development, advocacy, and education. Dr. Marshall is the author of The Vaccine Handbook: A Practical Guide for Clinicians (also known as The Purple Book), now in its 9th edition and available through a free app for iOS devices.