Health Information for the whole family
http://www.familydoctor.org 

U.S. Department of Health and Human Services - Health Finder
http://www.healthfinder.gov

U.S. Department of Health and Human Services - Health Finder for Kids
http://www.healthfinder.gov/scripts/SearchContext.asp?topic=14314

Centers for Disease Control and Prevention
http://www.cdc.gov

Mayo Clinic
http://www.mayoclinic.com

American Cancer Society
http://www.cancer.org

American Heart Association
http://www.americanheart.org

American Stroke Association
http://www.strokeassociation.org