Key populations and power: people-centred social innovation in Asian HIV services.

Key populations increasingly lead the design, implementation, and evaluation of HIV services, which provides an opportunity to make them more people-centred. Despite many challenges, a strong argument that these populations must have a greater role in HIV service planning, development, and delivery worldwide exists. This Viewpoint focuses on Asia, where key populations have advocated for legal reform, engaged vulnerable groups to decrease stigma, co-created innovative HIV services, and developed new key population-led health services. Further research on key populations and their roles in HIV implementation and sustainable scale-up is needed in Asia and beyond.