Healthline
http://www.healthline.com/
From their website: Search The Web’s Best Health Sites. 62,000 web sites with between 45-50 million pages.
Healthline is the fastest and easiest way to find, understand and manage information about consumer health. Our mission is to empower health information seekers by providing them with an innovative and unique guided search experience - one based on trust, comprehensiveness, contextual relevancy, personalization, and interactivity.
Unlike general purpose search engines, Healthline only searches the top health sites on the Web, so users receive precise and relevant health information without having to sift through pages of unnecessary and unrelated results. Healthline’s search technology comprehends the words and phrases used in both the medical and non-medical worlds - for example, a search for “brittle bone disease” will also return results for “Osteogenesis Imperfecta”, its medical equivalent.
I spent some time reviewing this site (it is free to join), and I was impressed.
Mindy
