A week before World AIDS Day, UNAIDS, the United Nations AIDS program, offered some encouraging news.

Estimates show that new HIV infections peaked in 2000 – and have since fallen by 35 percent – while AIDS-related deaths have fallen a startling 42 percent since a peak in 2004.

Additionally, roughly 15.8 million people are currently on HIV treatment. That's a huge increase from the 2.2 million on treatment ten years ago.

UNAIDS Executive Director Michel Sidibe told reporters on Tuesday that the number of people on life-saving treatment doubles every five years.

“Today, we can say we move from despair to hope,” he said during a briefing, Reuters reported.

“If we manage to sustain our investment and … double the numbers of people put on treatment, we can really break the backbone of this epidemic,” Sidibe said.

An estimated 36.9 million people at the end of 2014 were infected with HIV, the virus that causes AIDS.