There are 11.8 million young people (aged 15-24) living with HIV/AIDS globally -- 7.3 million are young women and 4.5 million are young men. This report contains important new data about why young people are key to defeating the global HIV/AIDS epidemic, including results from more than 60 new national surveys. It reaffirms that we must accord top priority to making investments in the well-being of young people and to engaging them in the fight against HIV/AIDS (adapted from author).