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Immunogenicity of a fourth dose of Haemophilus influenzae type b (Hib) conjugate vaccine and antibody persistence in young children from the United Kingdom who were primed with acellular or whole-cell pertussis component-containing Hib combinations in infancy.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Southern, Jo Mcvernon, Jodie Andrews, Nick Morris, Rhonwen Crowley-Luke, Annette Goldblatt, David Miller, Elizabeth |
| Copyright Year | 2007 |
| Abstract | In response to the rising incidence of Haemophilus influenzae type b (Hib) disease in the United Kingdom, a national campaign to give a booster dose of single-antigen Hib conjugate vaccine to children aged 6 months to 4 years was undertaken in 2003. Children (n = 386) eligible for Hib vaccine in the campaign were recruited. Hib antibody concentrations were measured before boost and at 1 month, 6 months, 1 year, and 2 years after boost and were analyzed according to children's ages at booster dose and whether a Hib combination vaccine containing acellular pertussis (aP) or whole-cell pertussis (wP) components was given in infancy. The geometric mean antibody concentrations (GMCs) before the booster declined as the time since primary immunization increased (P < 0.001), and GMCs were threefold higher in recipients of wP-Hib than aP-Hib combination vaccines (P < 0.001). GMCs 1 month after the booster increased with age (P < 0.001) as follows: 6 to 11 months; 30 microg/ml (95% confidence interval [CI], 22 to 40); 12 to 17 months, 68 microg/ml (95% CI, 38 to 124); and 2 to 4 years, 182 microg/ml (151 to 220), with no difference according to the type of priming vaccine received. Antibody levels declined after the booster, but 2 years later, GMCs were more than 1.0 microg/ml for all age groups. By extrapolating data for the decline in antibody levels, we found the GMCs 4 years after boosting were predicted to be 0.6, 1.4, and 2.6 microg/ml for those boosted at 6 to 11 months, 12 to 17 months, and 2 to 4 years, respectively, with levels of at least 0.15 microg/ml in about 90% of individuals. A booster dose of Hib vaccine given after the first year of life should provide long-lasting protection. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://cvi.asm.org/content/14/10/1328.full.pdf |
| PubMed reference number | 17699835v1 |
| Volume Number | 14 |
| Issue Number | 10 |
| Journal | Clinical and vaccine immunology : CVI |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Booster Immunization - ActSubstanceAdministrationCode Chancroids Confidence Intervals Haemophilus influenzae type b polysaccharide vaccine Hemophilus Immunostimulating conjugate (antigen) Influenza Pertussis Vaccine Priming Exercise Vaccines, Combined Vaccines, Conjugate acellular pertussis vaccine, inactivated |
| Content Type | Text |
| Resource Type | Article |
