Objective: To examine the comparative immunogenicity of the Haemophilus influenzae type b-meningococcal protein (PRP-OMP) conjugate vaccine in Polynesian and non-Polynesian New Zealand infants.
Methodology: Fifty-six Polynesian and 53 non-Polynesian infants aged 2-7 months recruited from primary health care settings in Auckland received a two-dose primary series of PRP-OMP. A sub-sample of 83 participants received a booster dose of PRP-OMP at 12-16 months of age. Anti-PRP antibody concentrations were measured in pre- and post-vaccination blood samples.
Results: Antibody responses consistent with long-term protection (> or = 1.00 microgram/mL) were observed in 72, 85 and 95% of children following the first, second and booster doses.
Conclusions: Despite differences in disease epidemiology, PRP-OMP was highly immunogenic in Polynesian and non-Polynesian infants.
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