The Get Smart Web site at the Centers for Disease Control and Prevention (CDC) provides information for both consumers and health professionals on the appropriate use of antibiotics. The Web site explains the dangers of inappropriate use of antibiotics and gives tips on actions people can take to feel better if they have an infection that cannot be helped by antibiotics. Some materials are available in English and in Spanish.

The American College of Physicians (ACP) is a national organization of internists. Doctors of internal medicine focus on adult medicine and have had special study and training focusing on the prevention and treatment of adult diseases. The ACP provides information for patients and families on the organization's website, including information on diseases and conditions, end-of-life care, women's issues, and immunizations. The site also offers video news stories, health tips, special reports, and a link to the ACP diabetes webpage.

This website is sponsored by the Nemours Foundation. It has a wide range of information about children's health, from allergies and diseases to normal growth and development (birth to adolescence). This website offers separate areas for kids, teens, and parents, each providing age-appropriate information that the child or parent can understand. You can sign up to get weekly emails about your area of interest.

The National Institute of Allergy and Infectious Diseases conducts research and provides consumer information on infectious and immune-system-related diseases.