Martin Kulldorff

Rule Changes

As of May 2026: Leads reconstituted ACIP reviewing long-established vaccine recommendations

The CDC's Advisory Committee on Immunization Practices (ACIP) voted 8–3 on December 5, 2025 to end the recommendation that every U.S. newborn receive a hepatitis B shot within 24 hours of birth. The committee had been recently overhauled under HHS Secretary Robert F. Kennedy Jr.; acting CDC Director Jim O'Neill ratified the change on December 16, 2025.

Updated May 9