A modelling study suggests that replacing universal birth-dose hepatitis B vaccination in the US with delayed or shared decision-making policies could leave millions of children vulnerable and increase chronic infections.
A modelling study published in Annals of Internal Medicine suggests that changing the United States childhood hepatitis B schedule could leave many more children vulnerable to infection and sharply increase the number who develop chronic disease. According to the report, replacing the current universal birth-dose approach with a delayed or shared decision-making strategy could raise chronic hepatitis B infections among children by a wide margin, with the largest increase seen under the more flexible policy.
Researchers at Massachusetts General Hospital and Harvard Medical School used a Markov state-transition model to follow a single birth cohort of 3.6 million infants and estimate the long-term effects of possible policy changes. The study compared universal vaccination at birth with two alternatives: postponing vaccination until two months of age for infants born to mothers without hepatitis B virus infection, and a shared decision-making approach for that same group. The model projected that delaying the first dose would increase chronic infections acquired by age 20 by 19%, while the shared decision-making approach would increase them by 83%, and leave more than half of children entering adulthood without protection.
The findings come against a broader background of uneven hepatitis B protection in the United States. Recent JAMA articles have described suboptimal immunity levels in adults and high-risk groups, including liver transplant recipients, and have argued that vaccination policy remains central to prevention efforts. One JAMA analysis found that only 59.9% of liver transplant recipients were vaccinated, underscoring the gaps that can exist even among patients at elevated medical risk.
Taken together, the studies reinforce the public-health case for preserving early hepatitis B vaccination as a routine part of newborn care. The modelling paper concludes that universal vaccination at birth remains the most effective way to prevent childhood infection and reduce the pool of future infections, a view that aligns with other expert commentary in JAMA stressing the importance of timely immunisation, screening and follow-up care.
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