Merck Manuals is are one of the world’s most widely used medical information resource. The Manuals have committed to making the best current medical information accessible by up to 3 billion health care professionals and patients on every continent by 2020.

Healthfinder is a consumer-oriented site has resources on a wide range of health topics selected from over 1,600 government and non-profit organizations to bring you the best, most reliable health information on the Internet.

MedlinePlus contains summaries for over 800 diseases, conditions and wellness topics as well as the latest health news, an illustrated medical encyclopedia, and information on prescription and over-the-counter medications.