The prevalence of the human immunodeficiency virus (HIV) that causes AIDS is falling among young people in 16 of the 25 countries most affected by the disease, a study by UNAIDS found, with many of them on track to hit a 25 percent reduction target in HIV/AIDS rates in 15- to 24-year-olds by the end of the year.
"Young people have shown that they can be agents of change in the prevention revolution," the report said.
