Long-term anti-HBs antibody persistence and immune memory in children and adolescents who received routine childhood hepatitis B vaccination.
Hum Vaccin Immunother
; 8(6): 813-8, 2012 Jun.
Article
em En
| MEDLINE
| ID: mdl-22508412
ABSTRACT
This paper presents data from two studies that evaluated 5-y and 10-y persistence of antibodies against hepatitis B (HBV) surface antigen (anti-HBs) and immune response to an HBV vaccine challenge in children and adolescents who had received three doses of a HBV vaccine in infancy as part of routine clinical practice [NCT00519649/NCT00984139]. Anti-HBs antibody concentrations ≥ 10 mIU/ml persisted in 83.3% (95% confidence interval [CI] 78.587.5) and 78.3% (95% CI 73.183.0) of subjects aged 78 y and 1213 y, respectively 510 y after infant vaccination. One month postchallenge dose, 98.2% (95% CI 95.999.4) and 93.7% (95% CI 90.296.2) of subjects in the two age groups, respectively had anti-HBs antibody concentrations ≥ 100 mIU/ml. Overall, 99.6% (95% CI 98100) and 97.2% (95% CI 94.598.8) of subjects aged 78 y and 1213 y mounted an anamnestic response to the HBV challenge dose, which was well-tolerated. Healthy children aged 78 y and adolescents aged 1213 y received three doses of a monovalent pediatric HBV vaccine (10 µg of HBsAg) before 18 mo of age. Serum samples collected before and one month post-HBV vaccine challenge dose were tested for anti-HBs antibody concentrations. Safety assessments were made for the HBV vaccine challenge dose. A three-dose childhood HBV immunization regimen induced persistence of antibodies against HBV infection for 10 y, up to adolescence. This vaccination regimen also conferred long-term immune memory against HBV as evidenced by the strong anamnestic response to the HBV vaccine challenge, despite waning anti-HBs antibody levels.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Vacinação
/
Vacinas contra Hepatite B
/
Hepatite B
Tipo de estudo:
Clinical_trials
Limite:
Adolescent
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Child
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Female
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Humans
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Male
Idioma:
En
Revista:
Hum Vaccin Immunother
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
Índia