In a move that has drawn widespread condemnation from the scientific and medical communities, Health and Human Services (HHS) Secretary Robert F. Kennedy Jr. abruptly dismissed all 17 members of the Centers for Disease Control and Prevention’s (CDC) independent Advisory Committee on Immunization Practices (ACIP) on Monday. He swiftly replaced them with eight new appointees—many of whom are known for their criticism of vaccines and for promoting misinformation.

This sweeping overhaul has raised alarm among public health experts, who warn that the nation’s vaccine policy infrastructure is now under direct attack. Kennedy appears to be acting with breakneck speed to consolidate control and institutionalize his public health agenda before meaningful resistance can be mounted against what many are calling a scientific counter-revolution.