What is thimerosal, does it have side effects and why is RFK Jr. removing the controversial preservative from the flu shot?

Although it has been largely phased out of U.S. vaccines, thimerosal has long been targeted by anti-vaccine advocates.

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

Flu shots that have more than one dose of vaccine contain thimerosal; other versions don’t have it. HHS said Wednesday that ...

The mercury-based ingredient has prompted concerns from some organizations, although the CDC has said there is no evidence it ...

Following a recommendation from a panel of CDC advisors, HHS Secretary Robert F. Kennedy Jr. on Wednesday ordered that the ...

Secretary Robert F. Kennedy Jr. | HHS Secretary Robert F. Kennedy Jr. has signed off on a recommendation from an advisory ...

Following an overhaul at ACIP, the HHS secretary took the advice of the committee’s new members, saying he was acting on guidance that dated back to 1999.

RFK Jr. approves a nationwide shift to mercury-free flu vaccines, ending decades of thimerosal use amid rising safety and ...

Banning vaccine ingredients without cause increases the perceived risk of vaccines," one prominent health group said.

The Wall Street Journal was the first to report on Kennedy’s plan last Friday. RFK Jr. is expected to remove all 16 members ...