All U.S. flu shots go mercury-free after RFK Jr. signs thimerosal ban into law. New doses roll out in August.
On July 23, 2025, the U.S. government officially shut the door on thimerosal. The mercury-based compound, once common in multi-dose flu vials, is now absent from every influenza injection distributed nationwide. The decision followed a 5–1–1 vote from the CDC’s …