1 National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia; Emory University School of Medicine, Atlanta, Georgia. Electronic address: ppatel@cdc.gov.
2 Minnesota Department of Health, Minneapolis, Minnesota.
3 Association of State and Territorial Health Officials, Arlington, Virginia.
4 National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, Georgia.