Long-term seroprotection after an adolescent booster meningococcal serogroup C vaccination

Philip C S de Whalley, Matthew D Snape, Emma Plested, Ben Thompson, Elizabeth Nuthall, Omar Omar, Ray Borrow, Andrew J Pollard

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


OBJECTIVES: To determine long-term seroprotection after serogroup C meningococcal (MenC) vaccination at the age of 9-12 years, with or without booster vaccination at the age of 13-15 years.

DESIGN: Observational cohort study; follow-on from randomised study.

SETTING: Participants were recruited from English secondary schools (in Oxfordshire and Buckinghamshire).

PARTICIPANTS AND INTERVENTIONS: Participants were primed with MenC CRM-glycoconjugate vaccine at the age of 9-12 years in the UK routine immunisation campaign. In previous studies they were randomised at 13 to 15 years of age to receive a booster dose of MenC-CRM glycoconjugate vaccine (CRM-group) or bivalent meningococcal serogroup A/C polysaccharide vaccine (PS-group), or they received no additional doses of MenC vaccine (control group). In this follow-on study, a blood sample was obtained 11 years after primary immunisation. Of 531 individuals eligible to participate, 134 were enrolled, and 124 were included in the analysis.

MAIN OUTCOME MEASURES: MenC serum bactericidal antibody (SBA) geometric mean titre; proportion of participants with SBA titre ≥8 (putative protective threshold).

RESULTS: Median ages at priming, boosting and blood sampling were 10.61, 14.42 and 22.11 years, respectively. Geometric mean titres for MenC SBA were: CRM group 1373 (95% CI 954 to 1977); PS group 1024 (687 to 1526); and controls 284 (167 to 483). SBA titres ≥8 were present in 50/54 (92.6%) controls and 70/70 (100%) boosted individuals.

CONCLUSIONS: The planned introduction in the UK of an adolescent booster of MenC conjugate vaccine in 2013 is likely to provide sustained protection against MenC disease.

TRIAL REGISTRATION: Registered on ClinicalTrials.gov (NCT01459432).

Original languageEnglish
Pages (from-to)686-91
Number of pages6
JournalArchives of Disease in Childhood
Issue number9
Publication statusPublished - Sept 2013


  • Adolescent
  • Child
  • Cohort Studies
  • England
  • Female
  • Follow-Up Studies
  • Humans
  • Immunization, Secondary/methods
  • Male
  • Meningococcal Infections/immunology
  • Meningococcal Vaccines/administration & dosage
  • Neisseria meningitidis, Serogroup C/immunology


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