Ruben Bermudez stands in front of a sign that says in Spanish, "To love yourself is to protect yourself." He has struggled to remain eligible for AIDS drug assistance programs since he went on treatment four years ago. Jessica Camille Aguirre/NPR hide caption

itoggle caption Jessica Camille Aguirre/NPR

"You've been condomized!" said Joy Lynn Alegarbes, of The Condom Project, which promoted safe sex at the 19th International AIDS Conference. The group handed out more than 850,000 condoms this week. Benjamin Morris/NPR hide caption

itoggle caption Benjamin Morris/NPR

Dr. Lisa Sterman holds Truvada pills at her office in San Francisco. The drug was recently approved by the Food and Drug Administration to prevent infection in people at high risk of infection with HIV. The pill, already used to treat people with HIV, also helps reduce the odds they will spread the virus. Jeff Chiu/AP hide caption

itoggle caption Jeff Chiu/AP

Nurse Maria Vatista draws blood from a Greek drug addict for an HIV test in a mobile testing van in Athens last year. HIV infection rates are rising, as Greece's financial crisis has led the government to cut health and social services, including a successful needle exchange program. Yannis Behrakis/Reuters/Landov hide caption

itoggle caption Yannis Behrakis/Reuters/Landov

Timothy Ray Brown, shown in May 2011 with his dog Jack in San Francisco, is the only man ever known to have been fully cured from AIDS. Brown is known as the "Berlin patient" because he had a bone marrow transplant in a German hospital five years ago. Eric Risberg/AP hide caption

itoggle caption Eric Risberg/AP

A mobile clinic set up to test students for HIV is parked near Madwaleni High School in Mtubatuba, KwaZulu-Natal, South Africa on March 8, 2011. Parts of the South African province have HIV rates that are more than twice the national average. Stephane de Sakutin/AFP/Getty Images hide caption

itoggle caption Stephane de Sakutin/AFP/Getty Images

Activist Alexandra Volgina (right) accepts the Red Ribbon Award at the 19th International AIDS Conference for her grassroots group Patients in Control, which has worked to improve HIV treatment programs in Russia. Ryan Rayburn/IAS hide caption

itoggle caption Ryan Rayburn/IAS

Health care workers in South Africa speak to residents during a door-to-door AIDS awareness campaign, part of a series of prevention efforts that has helped lower the country's HIV infection rate. Mujahid Safodien /Reuters /Landov hide caption

itoggle caption Mujahid Safodien /Reuters /Landov

Condom use has dropped among black youth, even as teens engage in less risky sexual behavior overall. Mike Segar/Reuters/Landov hide caption

itoggle caption Mike Segar/Reuters/Landov

A heroin user keeps a syringe tucked behind his ear at a park in the city of Medan on Indonesia's Sumatra island. Cordita-Caritas Medan, a nongovernmental organization active there, works to reduce HIV infections through rehab of drug users and a needle exchange program. Sutanta Aditya/AFP/Getty Images hide caption

itoggle caption Sutanta Aditya/AFP/Getty Images