Sex, Age, and Race Effects on Immunogenicity of MenB-FHbp, A Bivalent Meningococcal B Vaccine: Pooled Evaluation of Clinical Trial Data

Infect Dis Ther. 2020 Sep;9(3):625-639. doi: 10.1007/s40121-020-00322-5. Epub 2020 Jul 17.

Abstract

Introduction: An extensive clinical development program showed that the meningococcal serogroup B-factor H binding protein (MenB-FHbp) vaccine affords protection against MenB disease for adolescents and adults. Data were pooled from multiple studies within the program to examine whether MenB-FHbp immunogenicity was influenced by sex, age, or race.

Methods: Immunogenicity was assessed in subjects from seven studies who received 120 µg MenB-FHbp (at 0, 2, 6 months) and had evaluated immune responses against four representative test strains via serum bactericidal assays using human complement (hSBAs). Immune responses were presented by sex (male, female), age group (10-14, 15-18, 19-25, 10-25 years), and race (white, black, Asian, other).

Results: Among 8026 subjects aged 10-25 years included in this analysis, MenB-FHbp elicited robust immune responses in a high percentage of subjects regardless of demographic characteristics. Across all test strains and demographic subsets, a ≥ 4-fold rise in titer from baseline was achieved in 76.7-95.0% of subjects, with no major differences by sex, age groups assessed, or races evaluated. Corresponding percentages achieving titers ≥ the lower limit of quantification (LLOQ) against all four strains combined were 79.7-87.3% (sex), 81.6-85.5% (age), and 80.0-88.1% (race). Minor differences were observed for geometric mean titers and percentages of subjects achieving titers ≥ LLOQ against each strain based on demographics.

Conclusion: These data suggested no clinically meaningful differences in MenB-FHbp immunogenicity when administered as a three-dose schedule based on sex, ages assessed, or races evaluated. This analysis supports the continued recommended use of MenB-FHbp to prevent MenB disease in adolescents and young adults.

Trial registration: ClinicalTrials.gov identifiers, NCT00808028, NCT01830855, NCT01323270, NCT01461993, NCT01461980, NCT01352845, and NCT01299480.

Keywords: Clinical trial; Immunogenicity; Invasive meningococcal disease; Serogroup B; Vaccines.

Associated data

  • ClinicalTrials.gov/NCT01830855
  • ClinicalTrials.gov/NCT01461980
  • ClinicalTrials.gov/NCT01323270
  • ClinicalTrials.gov/NCT01461993
  • ClinicalTrials.gov/NCT01299480
  • ClinicalTrials.gov/NCT01352845
  • ClinicalTrials.gov/NCT00808028