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Martin Kulldorff

Martin Kulldorff

Chair, Advisory Committee on Immunization Practices (ACIP)

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ACIP moves to end universal hepatitis B shots at birth

Rule Changes

Leads reconstituted ACIP reviewing long-established vaccine recommendations

On December 5, 2025, the Centers for Disease Control and Prevention’s (CDC’s) Advisory Committee on Immunization Practices (ACIP)—recently overhauled under Health and Human Services Secretary Robert F. Kennedy Jr.—voted 8–3 to end the longstanding recommendation that every U.S. newborn receive a hepatitis B vaccine dose within 24 hours of birth. For babies whose mothers test negative for hepatitis B, the panel now advises individualized decision-making with parents and suggests delaying the first dose until at least two months of age, while retaining the birth dose for infants whose mothers are infected or whose status is unknown; acting CDC Director Jim O’Neill ratified this on December 16, 2025.

Updated Feb 5