About The Study: The findings of this study indicate declines of more than 10 percentage points in newborn hepatitis B virus (HBV) vaccination in the last 2 years, following 6 years of growth. These estimates derived from large-scale hospital and clinic electronic health records align with WHO and CDC coverage through 2022 and provide interim surveillance for 2023-2025, a period not yet reflected in national or global reports.
Corresponding Author: To contact the corresponding author, Joshua M. Rothman, MD, MS, email jmrothman@health.ucsd.edu .
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(doi:10.1001/jama.2026.0866)
Editor’s Note: Please see the article for additional information, including other authors, author contributions and affiliations, conflict of interest and financial disclosures, and funding and support.
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