The Third Meeting of the GMS Working Group on Health Cooperation (WGHC-3) was held on 12–13 December 2019 in Bangkok, Thailand. WGHC-3 was co-organized by the Ministry of Public Health (MOPH) of Thailand and the ADB. The meeting convened participants from the six GMS countries (Cambodia, PRC, Lao PDR, Myanmar, Thailand, and Viet Nam) and representatives of development partners, civil society organizations (CSOs), private sector, and ADB