amfAR
The American Foundation for AIDS Research (amfAR)'s mission is to prevent HIV infection and the disease and death associated with it and to protect the human rights of all people threatened by the epidemic of HIV/AIDS.

HIV InSite
A comprehensive site covering medical, prevention, and policy issues surrounding HIV and AIDS. Contains complete text of the AIDS Knowledge Base and other original content as well as links to credible sources of information. HIV InSite is a project of the AIDS Research Institute of the University of California San Francisco.

CDC National Prevention Information Network
(NPIN) is the US reference, referral, and distribution service for information on HIV/AIDS, sexually transmitted diseases (STDs), and tuberculosis (TB). NPIN produces, collects, catalogs, processes, stocks, and disseminates materials and information on HIV/AIDS, STDs, and TB to organizations and people working in those disease fields.

Centers for Disease Control Divisions of HIV/AIDS Prevention
Site includes fact sheets, general information, frequently asked questions, trends, recommendations and guidelines.

The HIV/AIDS Treatment Information Service (ATIS)
is your central resource for federally approved treatment guidelines for HIV and AIDS. A US Department of Health and Human Services project managed by the National Library of Medicine

National Center for HIV, STD and TB Prevention
A project of the Centers for Disease Control, the center provides national leadership through research, policy development, and support of effective services to prevent sexually transmitted diseases (including HIV infection) and their complications such as enhanced HIV transmission, infertility, adverse outcomes of pregnancy, and reproductive tract cancer.

Office of HIV/AIDS Policy
Federal efforts undertaken to fight HIV/AIDS and find the resources you need to help you get involved.

UNAIDS
The main advocate for global action on HIV/AIDS. UNAIDS leads, strengthens and supports an expanded response aimed at preventing the transmission of HIV, providing care and support, reducing the vulnerability of individuals and communities to HIV/AIDS, and alleviating the impact of the epidemic.

US National Library of Medicine
Access to some of the world's largest medical library resources, including MEDLINE/PubMed and MEDLINEplus.