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July 24, 2012 Nearly 1 in 5 South Africans is infected with HIV. But many of them don't know it. The lack of information hinders treatment and also enables the spread of HIV. To close the gap, some groups are taking HIV testing door to door.

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July 23, 2012 The first reports of AIDS were from Los Angeles, New York and San Francisco among gay and bisexual men. Even now, you can see the lingering geographic contours of how the epidemic unfolded with AIDSVu, an interactive map developed by Emory University's school of public health.

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July 23, 2012 The leading international AIDS conference returns to the U.S. after a 22-year hiatus. A lot has happened in the years since the conference was last here. Treatments have turned a disease with a near-certain death sentence into a disease that people can live with for decades. And there is evidence that the epidemic could be greatly slowed or even stopped.

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July 23, 2012 A new approach in San Francisco provides HIV testing and treatment for patients with the virus who didn't know they were at risk. "Test and treat" requires long-term vigilance by doctors and patients, but early evidence suggests that it is reducing HIV in the city.

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On All Things ConsideredPlaylist

• TIMELINE: The Fight Against HIV/AIDS

July 22, 2012 The International AIDS Conference is being held this week in Washington, D.C. HIV infection in the host city is the highest in the nation. Though treatments have come a long way in the past 30 years, those high infection rates — especially among the black community — show there is still much work to be done.

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On All Things ConsideredPlaylist

July 22, 2012 The country has the largest HIV epidemic in the world, and it's also had one of the most conflicted responses to the virus. For years, the government questioned the link between HIV and AIDS and offered little by way of treatment. Now, South Africa is trying to make up for lost time.

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On Weekend Edition SundayPlaylist

July 21, 2012 WAMUWashington, D.C., has the highest rate of HIV infection in the nation. A key initiative in the battle to contain the epidemic is encouraging people to get tested. From the grocery store to the nightclub, community health workers are pushing the conversation with on-the-spot test results.

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On Weekend Edition SaturdayPlaylist

July 21, 2012 In the 1980s, HIV/AIDS swept across the globe. It soon reached pandemic proportions. In the three decades since, advances in drug therapies have transformed the disease from a death sentence to a chronic illness. In recent years, public health officials have embraced the idea of "test and treat" – that everyone who has HIV should know it and get into treatment right away. With new drug regimens that can reduce the amount of HIV in the blood to undetectable levels, researchers now believe they can halt the spread of HIV and end the pandemic.

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July 20, 2012 When other countries were struggling to deal with the HIV epidemic, Brazil openly acknowledged the problem and launched aggressive campaigns to raise awareness and treat the disease. But activists now say say there are no longer organized HIV prevention efforts.

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On Morning EditionPlaylist

July 19, 2012 Each year hundreds of thousands South Africans become infected with HIV, so it might seem that a drug to slow transmission would be welcome. But there's concern about unintended consequences if Truvada is used widely for prevention.

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July 19, 2012 HIV is like a jack-in-the-box. When the viruses bump into particular cells in the immune system, the viruses' shells pop open and their genes enter the cells. Experimental therapies for HIV could stop the virus from getting in.

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