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Heroin AddictVitaly Melnikov, a 29-year-old Russian heroin addict, shoots up in a Moscow apartment. He learned to use clean needles in a Doctors Without Borders risk-reduction program aimed at lowering the numbers of people passing disease through dirty needles.
Photograph by Karen Kasmauski

Photos of the AIDS Crisis

See pictures of AIDS and HIV patients, treatment, and more from National Geographic.