A division of the U. S. Department of Health & Human Services, AHRQ's site includes resources such as research findings and reports, fact sheets, and data related to making improvements in the safety, quality, accessibility, and affordability in health care.
The CDC contains information on the symptoms and treatment of a variety of different diseases, data and statistics, as well as information related to emergency preparedness.
EMS.gov is the website for the Office of Emergency Medical Services, a division of the National Highway and Traffic Safety Administration. The site includes resources on Education, Preparedness, Research, and other important topics for emergency medical services. Information on the Federal Interagency Committee on Emergency Medical Services (FICEMS) and the National EMS Advisory Council (NEMSAC) is provided. The site's FAQs can be accessed here.
NIH, America's medical research agency, is a part of the U. S. Department of Health and Human Services. Its site includes articles, research reports, and other resources related to improving health and saving lives.
The U. S. National Library of Medicine's site features electronic information resources on a wide range of medical and health-related topics including links to health information such as Medline Plus, PubMed, and Digital Collections.