This joint publication by UNAIDS and WHO emphasizes the importance of integrating HIV prevention, testing, treatment and care and mental health services for people living with HIV. It provides a compilation of tools, best practices, recommendations and guidelines that facilitate the integration of interventions and services to address the interlinked issues of mental health and HIV. This publication is intended for global, regional and national policy-makers; programme implementers including at subnational levels; organizations working in and providers of HIV and mental health services; civil society; and community-based and community-led organizations and advocates.