1. Cameron Estrich, Carla L. DeSisto, Keriann Uesugi, and Alisa Velonis are with the School of Public Health, University of Illinois, Chicago. Carla L. DeSisto, Lisa Romero, Shanna Cox, and Charlan D. Kroelinger are with the Centers for Disease Control and Prevention, Atlanta, GA. Sanaa Akbarali and Ellen S. Pliska are with the Association of State and Territorial Health Officials, Arlington, VA. Sanaa Akbarali and Ellen S. Pliska are also guest editors for this supplement issue.