U.N. officials recently announced a global youth campaign focused on raising awareness on HIV/AIDS, particularly in South Africa, a nation that has registered the highest number of casualties. The campaign is happening while health experts warn youth of complacency against the disease, despite reported decreases in the number of people living with the condition. For VOA, reporter Vicky Stark spoke to Dr. John Nkengasong who leads U.S. global efforts to fight AIDS.