This article is the latest in an annual series analyzing federal funding for health security programs. We examine proposed funding in the President's Budget Request for FY2019, provide updated amounts for FY2018, and update actual funding amounts for FY2010 through FY2017. Building health security for the nation is the responsibility of multiple agencies in the US federal government, as well as that of state, tribal, territorial, and local governments and the private sector. This series of articles focuses on the federal government's role in health security by identifying health security-related programs in public health, health care, national security, and defense and reporting funding levels for that ongoing work.