A preservative removed from childhood vaccines 20 years ago is still causing controversy today − a drug safety expert explains

An expert committee that advises the Centers for Disease Control and Prevention on vaccines is meeting for the first time since Health Secretary Robert F. Kennedy Jr. abruptly replaced the committee’s 17 members with eight hand-picked ones on June 11, 2025.

The committee, called the Advisory Committee on Immunization Practices, generally discusses and votes on recommendations for specific vaccines. For this meeting, taking place June 25-26, 2025, vaccines for COVID-19, human…