Original: The highest number of orphans due to AIDS alive in 2007 was in South Africa (although the definition of AIDS orphan in South African statistics includes children up to the age of 18 who have lost either biological parent).
Simplified: In 2007, South Africa had more AIDS orphans than any other country, (although South Africa uses the term "AIDS orphan" differently than UNICEF and WHO. South Africa uses the term to talk about children under age 18 who lost either their father or their mother to AIDS).