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  • Title: Seroepidemiology of hepatitis B virus infection and impact of vaccination.
    Author: Huang P, Zhu LG, Zhu YF, Yue M, Su J, Zhu FC, Yang HT, Zhang Y, Shen HB, Yu RB, Zhai XJ, Peng ZH.
    Journal: World J Gastroenterol; 2015 Jul 07; 21(25):7842-50. PubMed ID: 26167084.
    Abstract:
    AIM: To investigate hepatitis B virus (HBV) prevalence in the general population in China. METHODS: A total of 148931 individuals were investigated by multistage random sampling in Eastern China. Data were collected on demographics and hepatitis B vaccination history, and serum was tested for hepatitis B surface antigen (HBsAg) by ELISA. RESULTS: A total of 11469 participants (7.70%, 95%CI: 7.57%-7.84%) were positive for HBsAg. HBsAg prevalence was 0.77% among children < 5 years old but increased progressively from adolescents (1.40%-2.55%) to adults (5.69%-11.22%). A decrease in HBsAg prevalence was strongly associated with vaccination and familial history of HBV among both children and adult groups. Meanwhile, HBsAg risk in adults was associated with invasive testing and sharing needles. The HBV immunization rate among participants aged < 20 years was 93.30% (95%CI: 93.01%-93.58%). Significant difference in HBsAg prevalence appeared between vaccinated and unvaccinated participants (3.59% vs 10.22%). CONCLUSION: Although the national goal of HBsAg prevalence < 1% among children < 5 years old has been reached, immunization programs should be maintained to prevent resurgence.
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