Long-term follow-up of hepatitis B vaccination in susceptible hospital personnel

Authors

  • CHO-YU CHAN,

    1. Division of Gastroenterology, Department of Medicine, Veterans General Hospital, and National Yang-Ming Medical College, Taipei, Taiwan, ROC
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  • SHOU-DONG LEE,

    Corresponding author
    1. Division of Gastroenterology, Department of Medicine, Veterans General Hospital, and National Yang-Ming Medical College, Taipei, Taiwan, ROC
      Shou-Dong Lee, Division of Gastroenterology, Department of Medicine, Veterans General Hospital, Taipei, Taiwan 11217, ROC.
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  • YANG-TE TSAI,

    1. Division of Gastroenterology, Department of Medicine, Veterans General Hospital, and National Yang-Ming Medical College, Taipei, Taiwan, ROC
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  • KWANG-JUEI LO

    1. Division of Gastroenterology, Department of Medicine, Veterans General Hospital, and National Yang-Ming Medical College, Taipei, Taiwan, ROC
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Shou-Dong Lee, Division of Gastroenterology, Department of Medicine, Veterans General Hospital, Taipei, Taiwan 11217, ROC.

ABSTRACT

Two hundred and sixty-seven susceptible hospital personnel who had been randomly divided into three groups to receive different doses (5 μg, 2 μg or 1 μg) of a plasma-derived hepatitis B vaccine on a four-dose schedule were investigated annually for 4 years. Of them, 251 were vaccine responders. The percentages of persistence of antibody to hepatitis B surface antigen (anti-HBs) in these 3 groups were 95.5% (84/88), 92.3% (72/78) and 95.3% (81/85), respectively (P > 0.05). During the follow-up period, 12 of 21 (57.1%) responders with low anti-HBs titres (10–100 miu/mL) and 3 of 48 (6.3%) responders with medium anti-HBs titres (101–1000 miu/mL) were found to be anti-HBs seronegative, while none of the 182 candidates with high anti-HBs levels (> 1000 miu/mL) lost their anti-HBs. The 4 year cumulative rate of natural booster in the responders was 11.6% (29/251). None of the candidates became HBsAg positive during the follow-up period. This study revealed that low dose hepatitis B vaccine can provide satisfactory immunogenic response and long-term efficacy in Chinese adults and that the persistence of immunogenicity is not related to the vaccine dose but to the candidate's own initial anti-HBs response.

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