RFK Jr. will oversee agencies that spend $1.7 trillion annually on vaccines, food safety and the Medicare and Medicaid health insurance programs that cover roughly half of all Americans.

The Trump administration has created an existential crisis for several government agencies and departments — few more critical than the National Institutes of Health, as bird flu spreads through the U.

RFK Jr.'s swearing in as health secretary officially puts the nation's health in the hands of the MAHA movement.