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Effectiveness of the targeted hepatitis B vaccination program in Greenland

Author

Listed:
  • Børresen, M.L.
  • Koch, A.
  • Biggar, R.J.
  • Ladefoged, K.
  • Melbye, M.
  • Wohlfahrt, J.
  • Krause, T.G.

Abstract

Objectives. To evaluate the effectiveness of the hepatitis B virus (HBV) vaccination program in Greenland, which targets children born to mothers who are positive for HBV surface antigen (HBsAg), we determined vaccination coverage, levels of postvaccination antibodies, and frequency of breakthrough infections in at-risk children. Methods. We conducted a population-based retrospective cohort study with data from nationwide registries. We identified all children born to HBsAgpositive mothers from 1992 to 2007 and collected data on their HBV vaccination status. In 2008 to 2010, we tested the children for HBV core antibody, HBsAg, and anti-HBsAg antibody (HBsAb). Results. Of 4050 pregnant women, 3.2% were HBsAg positive. Of 207 children born to these women, 20% received no vaccinations, and only 58% received at least 3 vaccinations. At follow-up, HBsAb levels in vaccinated children were much lower than expected, and 8 (6%) of 140 at-risk children had breakthrough infections, with 4 chronically infected (persistently HBsAg positive). Conclusions. The prevention program targeting children at risk for HBV in Greenland is ineffective. HBV vaccination should be included in the universal childhood vaccination program, and postvaccination HBsAb levels should be monitored.

Suggested Citation

  • Børresen, M.L. & Koch, A. & Biggar, R.J. & Ladefoged, K. & Melbye, M. & Wohlfahrt, J. & Krause, T.G., 2012. "Effectiveness of the targeted hepatitis B vaccination program in Greenland," American Journal of Public Health, American Public Health Association, vol. 102(2), pages 277-284.
    • Handle: RePEc:aph:ajpbhl:10.2105/ajph.2011.300239_8
    DOI: 10.2105/AJPH.2011.300239
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