USAID's mission is to partner with countries to end extreme poverty and promote resilient, democratic societies while advancing U.S. national security and economic prosperity.

USAID focuses on maternal and child health, nutrition, WASH, and other health issues, but not specifically on HIV/AIDS.

USAID supports health policy advocacy through a variety of mechanisms, including technical assistance, funding for research, and support for policy development.

USAID plays a significant role in the GFATM by providing funding, technical assistance, and advocacy.

USAID promotes health policy and advocacy in developing countries through a variety of mechanisms, including working with governments, supporting civil society organizations, and providing technical assistance.

USAID plays a leading role in PEPFAR by providing funding, coordinating activities, and working with other U.S. government agencies.

USAID supports health policy research through a variety of mechanisms, including funding research, supporting capacity development, and disseminating research findings.

USAID faces a number of challenges in promoting health policy and advocacy in developing countries, including weak health systems, lack of political will, and limited resources.

USAID measures the impact of its health policy and advocacy work by tracking a variety of indicators, including the number of people who receive health services, changes in health outcomes, and the sustainability of health programs.

USAID's health policy and advocacy work has led to a number of key achievements, including increased access to health services, improved health outcomes, and strengthened health systems.