Final answer:
The federal agency of the public health system that is most involved with the health and welfare of United States citizens is the U.S. Department of Health and Human Services (HHS). The HHS oversees several agencies and programs, including the Centers for Disease Control and Prevention (CDC), the Centers for Medicaid and Medicare Services (CMS), and the Food and Drug Administration (FDA). These agencies work together to address public health challenges and ensure access to quality healthcare.
Step-by-step explanation:
The federal agency of the public health system that is most involved with the health and welfare of United States citizens is the U.S. Department of Health and Human Services (HHS).
The HHS is responsible for protecting and promoting the health of all Americans, providing essential human services, and supporting scientific research.
It oversees several agencies and programs, including the Centers for Disease Control and Prevention (CDC), the Centers for Medicaid and Medicare Services (CMS), and the Food and Drug Administration (FDA).
These agencies work together to address public health challenges, ensure access to quality healthcare, and regulate healthcare products and services.