Research Letter

Hepatitis B Vaccine Series Completion by 18 Months in Infants Without a Birth Dose

JAMA Network Open 10.1001/jamanetworkopen.2026.9962

April 24, 2026 at 11:00 AM EDT

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This cohort study compares hepatitis B vaccination series completion by 18 months in infants who did vs did not receive a birth dose.

Corresponding Author: Joshua T. B. Williams, MD, Denver Health and Hospital Authority, 301 W Sixth Ave, MC 1911, Denver, CO 80204 (joshua.williams@dhha.org).

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