This page contains links to sources used in the development of this health topic. In regard to the information found on these links, the UAB Health System does not control or endorse the information presented on these Web sites.
American Medical Association
Centers for Disease Control and Prevention (CDC)
National Center for Health Statistics, part of the CDC, US Department of Health and Human Services
National Center of Infectious Diseases, part of the CDC
National Institute of Allergy and Infectious Diseases, part of the National Institutes of Health
UAB Health System