Four countries that account for a large number of people living with HIV in the region — India, Myanmar, Papua New Guinea and Thailand — reduced new HIV infections by more than 50%.
"Exceptional leadership is coming from the world's fastest-growing emerging economies of Brazil, Russia, India, China and South Africa (BRICS). Together, they contribute to more than half of all domestic spending on AIDS in low and middle-income countries. Their momentum is unparalleled, having increased domestic public spending by more than 122% between 2006 and 2011," the report said.
China currently invests more than 80% domestically, and the country has announced it will fully fund its AIDS response in the coming years.
India has committed to increase domestic funding to more than 90% in its next phase of the AIDS response.
"These fast growing economies have the potential to support others in the region, as well as exert leadership and influence on the AIDS response, both locally and globally," the report added.