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Seroepidemiology of hepatitis B virus infection in children 12 years after China’s expanded program on immunization in Qamdo, Tibet

  • Yao Hu
  • Ciyang
  • Dunzhuyongzong
  • Awangluosong
  • Zuoqing Yang
  • Aqing
Original Article
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Abstract

Although hepatitis B vaccine (HepB1) was first recommended through China’s Expanded Program on Immunization (EPI) in 1992, Tibet was able to offer universal HepB1 vaccination starting only in early 2004. This cross-sectional study was conducted to assess, 12 years after administration of HepB1, the seroepidemiology of hepatitis B virus (HBV) infection in children in Qamdo, Tibet. Focusing on a population of individuals ≤ 15 years of age living in Tibet, we analyzed serum samples from 261 healthy children for HBV status based on the presence of hepatitis B surface antigen (HBsAg), antibodies against HBV core antigen (anti-HBc), and antibodies against HBsAg (anti-HBs). Of all participants, 87.4% had received HepB1 vaccination. The overall anti-HBs-positive rate was 30.7%, with isolated anti-HBs in 75 participants (28.7%). Of all those studied, 13 (5.0%) were positive for HBsAg and 18 (6.9%) for anti-HBc. Participants who received vaccination in hospital at delivery had a lower prevalence of HBsAg than that of those born at home. By reducing HBV transmission, the EPI in Tibet protected most Tibetans younger than 15 years from becoming HBV carriers.

Keywords

Hepatitis B virus Hepatitis B surface antigen Seroepidemiology Tibet Vaccination 

Abbreviations

HepB1

Hepatitis B vaccine

HBV

Hepatitis B virus

EPI

China’s expanded program on immunization

HBsAg

Hepatitis B surface antigen

anti-HBs

Antibodies against HBsAg

HBeAg

Hepatitis B e antigen

anti-HBe

Antibodies against HBeAg

anti-HBc

Antibodies against HBV core antigen

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Copyright information

© Springer Nature Limited 2018

Authors and Affiliations

  • Yao Hu
    • 1
  • Ciyang
    • 2
  • Dunzhuyongzong
    • 2
  • Awangluosong
    • 2
  • Zuoqing Yang
    • 3
  • Aqing
    • 4
  1. 1.Department of Laboratory Medicine, Huashan Hospital, Shanghai Medical CollegeFudan UniversityShanghaiChina
  2. 2.Department of Laboratory MedicinePeople’s Hospital of Luolong CountyQamdoChina
  3. 3.Center for Disease Control and Prevention of Loulong CountyQamdoChina
  4. 4.Health Bureau of Luolong CountyQamdoChina

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