Cleopas Kapembwa Chisanga of Zambia, who is HIV positive, is the subject of a new video and will be broadcasting from this week's International AIDS Conference in Durban, South Africa. Sydelle Willow Smith/International Aids Society hide caption

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Sydelle Willow Smith/International Aids Society

A billboard asks Ugandans to abstain from sex until marriage. The photo was taken in 2005 in Kampala. Per-Anders Pettersson/Getty Images hide caption

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Per-Anders Pettersson/Getty Images

U.S. Spent $1.4 Billion To Stop HIV By Promoting Abstinence. Did It Work?

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African-American men who have sex with men face a high risk of becoming infected with HIV. Jose Luis Pelaez Inc/Blend Images/Getty Images hide caption

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Jose Luis Pelaez Inc/Blend Images/Getty Images

Gay and bisexual men were banned from donating blood over concern that HIV could contaminate the blood supply. Vesna Andjic/Getty Images hide caption

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Vesna Andjic/Getty Images

FDA Lifts Ban On Blood Donations By Gay And Bisexual Men

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Eduardo Gonzalez is HIV positive. His mother died of AIDS; his father, who's HIV positive, is in jail. The boy lives at Eunime, a Tijuana facility for children whose parents have faced AIDS in their family and who may themselves be infected. Courtesy of Malcolm Linton hide caption

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Courtesy of Malcolm Linton

Ricardo "Cobe" Williams, wearing the cap, served time for attempted murder before joining CeaseFire as a "violence interrupter." Above, he talks with Lil Mikey in a scene from the documentary The Interrupters. Lil Mikey, who'd also been in prison, went on to become an outreach worker with the organization. Aaron Wickenden/Courtesy of Kartemquin Films hide caption

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Aaron Wickenden/Courtesy of Kartemquin Films

Louis Arevalo holds his Truvada pills at his home in Los Angeles. The drug can be over 90 percent effective at preventing spread of HIV. Heidi de Marco/Kaiser Health News hide caption

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Heidi de Marco/Kaiser Health News

The bar chart tells all: That's how eighth-graders at Bakgatle Community Junior Secondary School in Botswana can compare the HIV infection rate of older men and of teenage boys. Don Boroughs for NPR hide caption

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Don Boroughs for NPR

In a study in Lesotho, the prospect of earning a cash prize in a lottery motivated young people to practice safe sex. iStockphoto hide caption

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iStockphoto

What Might Make Young People Practice Safe Sex? Lottery Tickets!

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