The most extensive collection of links on AIDS, with searchable electronic versions of many newsletters and a vast catalogue of news stories, plus discussion forums.

The influential medical journal sponsored by the International AIDS Society, with free access to abstracts. Full text access only available to subscribers.

A good searchable treatment database (although not as comprehensive as aidsmap), excellent news and analysis and a nice simple design.

An extensive range of continuing medical education materials and slide sets, together with conference coverage by US opinion leader clinicians. A very useful website.

A site which concentrates on news and conference reports, produced by former staff from the San Francisco AIDS Foundation. Some senior UK HIV and hepatitis clinicians are on the editorial board.

The electronic version of the AIDS Knowledge Base, a textbook developed by physicians at San Francisco General Hospital. The site also contains databases on trials, drug interactions and side effects, as well as exclusive news stories and a library of reports on prevention issues.

Comprehensive information about the activities of the International AIDS Society, daily news and a members area for IAS members.

This site has built its reputation on high-quality conference reports and a detailed syllabus of HIV Continuing Medical Education written by the leading experts.

An extensive collection of articles from HIV newsletters and other publications around the world, and an exclusive Ask the Experts forum for you to put questions to the leading doctors.

United Nations AIDS Programme - information about the activities of the programme, access to policy documents and records of UNAIDS-sponsored interventions; statistics on the global epidemic.