Performers promote safe-sex practices at the 2012 International AIDS Conference in Washington. HIV-infected people in China who are considered at risk of transmitting the virus to others, will receive antiretroviral therapy upon testing positive, said Wu Zunyou, director of the National Center for AIDS and Sexually Transmitted Disease Control and Prevention, during the meeting. The International AIDS Conference is a biannual gathering of AIDS scientists, international policymakers, and people living with AIDS from around the world. The weeklong conference, started on July 22, has over 400 sessions, 250 exhibitors and more than 30,000 attendees. [Photo by Sun Chenbei / China Daily]