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