This report gives a detailed analysis of progress and challenges towards achieving the 90-90-90 targets. It shows that, for the first time, over of half all people living with HIV have access to HIV-related treatment. In 2016, 19.5 million of the 36.7 million people living with HIV had access to treatment, and AIDS-related deaths have fallen from 1.9 million in 2005 to 1 million in 2016. Provided that scale-up continues, this progress puts the world on track to reach the global target of 30 million people on treatment by 2020.