Students at a medical college form a red ribbon for an HIV/AIDS prevention campaign in Yangzhou, East China's Jiangsu province, Nov 29, 2011. HIV/AIDS campaign activities are being organized across China ahead of the 24th World AIDS Day on Dec 1. This year's theme is "Getting to Zero" - zero HIV/AIDS-related infection, discrimination and death. [Photo/Xinhua]

Medical staff put red ribbons on an HIV/AIDS prevention campaign poster in Linyi, East China's Shandong province, Nov 29, 2011. [Photo/CFP]