The mission of the National Center for Infectious Diseases (NCID) is to prevent illness, disability, and death caused by infectious diseases in the United States and around the world. The Web site offers links to information about specific diseases and general areas of interest.

The American Academy of Family Physicians produces a variety of health-related educational materials. Its Web site offers a health library and bulletin board, news, and comments sections.

The American Academy of Pediatrics (AAP) offers a variety of educational materials, such as links to publications about parenting and general growth and development. Immunization information, safety and prevention tips, AAP guidelines for various conditions, and links to other organizations are also available.

The CDC's National Center for Immunization and Respiratory Diseases has information about vaccines and the diseases that can be prevented by immunization. The Web site includes the recommended immunization schedules for children, teens, and adults. There is also information about vaccine side effects and safety, school and state requirements, and immunization records. Interactive schedules are also available.