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Gregory A. Raczniak, Lisa R. Bulkow, Michael G. Bruce, Carolyn L. Zanis, Richard L. Baum, Mary M. Snowball, Kathy K. Byrd, Umid M. Sharapov, Thomas W. Hennessy, Brian J. McMahon, Long-Term Immunogenicity of Hepatitis A Virus Vaccine in Alaska 17 Years After Initial Childhood Series, The Journal of Infectious Diseases, Volume 207, Issue 3, 1 February 2013, Pages 493–496, https://doi.org/10.1093/infdis/jis710
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Abstract
The Centers for Disease Control and Prevention recommends hepatitis A virus (HAV) vaccination for all children at age 1 year and for high-risk adults. The vaccine is highly effective; however, protection duration is unknown. We report HAV antibody concentrations 17 years after childhood immunization, demonstrating that protective antibody levels remain and have stabilized over the past 7 years.