Centers for Disease Control and Prevention
The CDC, a part of the U.S. Department of Health and Human Services, aims to prevent and control disease, injury, and disability. Its website ably reflects this mission. One of the best government websites on the Internet, its coverage is broad. The "Diseases and Conditions" section covers major chronic and many infectious diseases, including AIDS, bird flu, common childhood diseases like measles and more exotic diseases like Ebola. Birth defects, traveler's health, emergency preparedness, vaccine and immunization information, accidents and injury information, infectious diseases, and workplace safety and health -- all are covered on this comprehensive site. Rich in information and colorfully illustrated, it also provides information in Spanish. Special features are regularly updated, and health news articles are added daily.