The Centers for Disease Control and Prevention Seasonal flu website includes information on flu basics, prevention, and treatments.
Maintained by the National Library of Medicine (NLM) at the National Institutes of Health (NIH), ClinicalTrials.gov provides access to information on publicly and privately supported clinical studies on a wide range of diseases and conditions.
This website provides authoritative information on breast cancer treatment, prevention, screening and testing, research, statistics, and clinical trials.
Website of the Centers for Disease Control and Prevention (CDC) provides links to immunization schedules in PDF for adults, adolescents, and children; recommendations and guidelines; list of vaccine-preventable diseases; answers to common questions; and information about vaccine safety and side-effects.
Mayo Clinic's web site provides authoritative information on all aspects of cholesterol, as well as cholesterol and heart disease risk calculators.
Interactive breast cancer tutorial and information about symptoms, diagnosis, treatment, screening, and prevention from the National Library of Medicine, the National Institutes of Health, and other health-related agencies and organizations.
FDA's web site provides information about a wide variety of topics for consumers.
Authoritative resource of "expert-reviewed" cancer information, searchable by type of cancer.
Information on heart attack, stroke, and cardiac arrest warning signs; diseases and conditions; and children and heart disease.