From C&EN (Chemical & Engineering News.  American Chemical Society)

The information superhighway - that is the Internet - appears to be studded with potholes in terms of medical information.  Eighty agencies and organizations from 25 countries recently searched the Wide World  Web on the occasion of the 1st International Health Claim Surf Day for data on six ailments: arthritis, cancer, diabetes, heart disease, HIV/AIDS, and multiple sclerosis.  The search turned up more than 1,200 sites that contained misleading or potentially false information.
[Today's Chemist at Work, 8, No. 2, 12 (1999)].