Women in Bangalore, India, make red ribbons at an HIV support center in November 2012. Manjunath Kiran/AFP/Getty Images hide caption

itoggle caption Manjunath Kiran/AFP/Getty Images

Outsiders might be unfamiliar with the U.K.'s National Health Service, but Brits love it so much that they devoted part of opening ceremonies at the 2012 London Olympics to the NHS. Courtesy of BBC One hide caption

itoggle caption Courtesy of BBC One

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

Young activists distribute condoms at an AIDS awareness event in Ashbury Park, N.J. Charles Sykes/AP hide caption

itoggle caption Charles Sykes/AP

HIV treatment regimens, like the pills in this patient's hand, keep AIDS at bay, but can take a harsh physical toll over the course of many years. Amy Sancetta/AP hide caption

itoggle caption Amy Sancetta/AP

A bus in Washington, D.C., displays an advertisement for a female condom in July 2010. To encourage their use, community groups distributed more than 500,000 of the female condoms, flexible pouches that are wider than a male condom but similar in length, during instruction sessions at beauty salons, barber shops, churches and restaurants. Drew Angerer/AP hide caption

itoggle caption Drew Angerer/AP