The US health department under Health Secretary Robert F. Kennedy Jr. is considering changing how vaccine recommendations are categorised and described, potentially replacing terms like "routine" or "universal" with more conditional-sounding designations such as "recommended with qualification." The move matters because it could make currently unambiguous vaccine advice appear optional or uncertain, without any new clinical evidence justifying the shift, continuing a pattern of efforts by Kennedy to weaken federal vaccine guidance.

The proposal appears in a 10-page Request for Information published in the Federal Register on Monday, inviting public comment until 20 September, though no formal changes have yet been made. Currently the Centers for Disease Control and Prevention, guided by its Advisory Committee on Immunization Practices, uses three categories: routine/universal, risk-based, and shared clinical decision-making. Kennedy cites a recent executive order from President Trump as justification, and has previously tried to cut childhood vaccine recommendations, replaced the entire ACIP panel with allies, and seen a federal judge temporarily block several of his changes amid a lawsuit from the American Academy of Pediatrics.