South Africa has the world's largest number of people living with HIV – 5.6 million, according to AVERT, a UK-based international AIDS organization. But it is also one of the 56 countries that have slowed or stabilized their HIV infection rates. There was a 25 percent decline in the infection rate between 2001 and 2009, according to the UN. The HIV infection rate among 18-year-olds declined from 1.8 percent in 2005 to 0.8 in 2008, and among women ages 15 to 24, it dropped from 5.5 percent to 2.2 percent between 2003 and 2008.