Chapter 6

Epidemiology and Prevention

Philip R. Spradling

Philip R. Spradling

Division of Viral Hepatitis, Centers for Disease Control and Prevention, Atlanta, GA, USA

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Dale J. Hu

Dale J. Hu

International Emerging Infections Program, US CDC Office, US Embassy, Beijing, China

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Brian J. McMahon

Brian J. McMahon

Liver Disease and Hepatitis Program, Alaska Native Tribal Health Consortium; Arctic Investigations Program, Centers for Disease Control and Prevention, Anchorage, AK, USA

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First published: 26 July 2013
Citations: 1

Summary

Infection with hepatitis B virus (HBV) continues to be a leading cause of illness and death in many areas of the world. The prevalence of chronic infection among countries varies greatly and remains high in many parts of Asia and Africa. In developed countries, the prevalence is higher among those who emigrated from high- or intermediate-prevalence countries and among those with high-risk behaviors. Since the release of a highly effective vaccine in 1981, universal infant hepatitis B vaccination programs implemented in a growing number of countries have resulted in dramatic reductions in perinatal and chronic infection. Among persons vaccinated during adolescence and adulthood, studies demonstrate persistence of immunity for at least 20 years, and revaccination (or “booster doses”) is not recommended. However, among persons vaccinated at birth, some data suggest loss of immunity in a significant proportion of persons after 15 years. Studies are ongoing to examine long-term immunity among persons who received hepatitis B vaccine at birth to determine if, when, and for whom revaccination may be warranted.

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