Paul A. Offit, MD, is the director of the Vaccine Education Center and an attending physician in the Division of Infectious Diseases at the Children's Hospital of Philadelphia as well as the Maurice R. Hilleman Professor of Vaccinology at the Perelman School of Medicine at the University of Pennsylvania. He is an internationally recognized vaccine expert and the coinventor of a rotavirus vaccine.

Charlotte A. Moser, MS, is codirector of the Vaccine Education Center at Children's Hospital of Philadelphia and creator of Parents PACK, the center's program for the public. She has spent more than two decades designing content and resources that answer pressing vaccine questions and has published numerous scientific papers related to disease prevention, immunology, and vaccines.