AIDSinfo is a U.S. Department of Health and Human Services (DHHS) project providing information on HIV/AIDS clinical trials and treatment.

This website uses the Internet to strengthen diagnosis of parasitic diseases, both in the United States and abroad.

A collaboration of U.S. government agencies, public health organizations and health sciences libraries

This free-of-charge search interface provides access to the TOXNET system of databases on toxicology, hazardous chemicals, and related areas. Includes Hazardous Substances Data Bank (HSDB), Integrated Risk Information System (IRIS), TOXLINE and others.