Formed in 1996, UNAIDS is consortium of six organizations headed by the United Nations. One of UNAIDS four key stated goals is "reducing vulnerability of individuals and communities to HIV/AIDS." On this website, UNAIDS provides data about the rates of people living with HIV around the world with a focus on Key Populations - those communities that UNAIDS have identified as especially vulnerable to HIV infection. The Key Populations examined in this online atlas include sex workers, intravenous drug users, and incarcerated individuals. When data is available, visitors can click on an individual country to see the rate of HIV infection in that demographic in that nation. Visitors can also view statistics about a variety of social customs, public policies, and laws across these countries, providing clues to practices and laws that may help alleviate infection rates. This atlas provides valuable information to students and researchers alike and may be a powerful resource for any health or social science classroom.