Study Projects 83% Rise in Chronic Hepatitis B if Birth Vaccination Discontinued
Modeling shows ending universal birth-dose could increase chronic infections by up to 83%.
Key facts
- Researchers project 83% increase in chronic hepatitis B infections by age 20 if birth vaccination is stopped.
- Deferred vaccination at 2 months would raise infections by 19% by age 20.
- Shared decision‑making policy would raise infections by 83% by age 20.
- The model used a Markov state‑transition approach on a cohort of 3.6 million infants.
- Authors conclude universal birth-dose remains most effective.
The study was published in Annals of Internal Medicine. Researchers from Massachusetts General Hospital and Harvard Medical School developed a Markov model. They projected long‑term effects of proposed policy changes.
The current practice vaccinates all newborns at birth. The model compared this with deferred vaccination at 2 months for infants born to mothers without hepatitis B. It also compared a shared decision‑making approach for the same group.
Results show deferred vaccination would increase chronic infections by 19% by age 20. Shared decision‑making would increase infections by 83% by age 20. The study states that universal birth-dose remains the most effective strategy.
The findings were reported by the New York Times and Medical Xpress. Both outlets cited the study and noted the potential rise in infections. The study was reviewed by Science X editorial process.
The CDC policy change was announced in January 2026. The Advisory Committee on Immunization Practices recommended deferred vaccination in December 2025. The study highlights the impact of these policy shifts.
Context
The U.S. federal government announced a change to the hepatitis B vaccination schedule in 2026, recommending deferred vaccination for infants born to mothers without hepatitis B. Researchers modeled the long‑term effects of this change. The study found a potential rise in chronic infections.
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How this was made
Compiled by our AI newsroom from 2 independent outlets, checked by a separate AI editor against the sources. Only claims found in the sources are reported. Spot an error? Every source is linked below.
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