U.S. Health and Human Services Secretary Robert F. Kennedy Jr. has approved a major Centers for Disease Control & Prevention recommendation to remove mercury-based thimerosal from all flu vaccines in the U.

Health and Human Services Secretary Robert F. Kennedy Jr. on Wednesday adopted recommendations from his newly remade vaccine advisory committee to remove a mercury-based preservative, thimerosal, from all U.

The action will remove from use the very few flu shots that contain the contested preservative, elevating unproven fears it poses health risks.