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Birth-dose hepatitis B vaccine and bronchopulmonary dysplasia risks in preterm infants
This editorial discusses the safety of administering the hepatitis B vaccine birth dose to preterm infants and examines the implications of a cohort study conducted in Australia on the association between birth-dose hepatitis B vaccination and bronchopulmonary dysplasia. The article reviews evidence supporting the World Health Organization recommendation that all newborns receive hepatitis B vaccination within 24 hours of birth, regardless of gestational age or birthweight, while noting concerns arising from limited real-world safety data in extremely preterm infants. The editorial summarizes findings indicating no association between receipt of a birth dose of hepatitis B vaccine and an increased risk of bronchopulmonary dysplasia or early mortality among infants born before 29 weeks of gestation. The authors also discuss methodological challenges in evaluating vaccine safety using observational data, including the potential effects of confounding by indication and healthy vaccine recipient bias. Particular attention is given to the complexities of studying medically fragile newborns who require intensive care and may differ systematically from unvaccinated infants. The editorial highlights the strengths and limitations of existing vaccine safety surveillance systems and underscores the need for improved study designs, expanded data linkages and prospective research to support the evaluation of vaccine and other preventive interventions in newborn populations.
Journal Article