Geometric Mean Titers (GMTs) of Meningococcal Serogroup C (MenC) Specific Serum Bactericidal Antibody (SBA) and Proportion of Participants with an SBA titer ≥8 and ≥128 prior to (T0) and 1 Month (T1) and 1 Year (T2) after the MenC Conjugate Booster.

NOTE: Differences between groups in SBA GMTs at T0 were determined using the Mann-Whitney U test. Differences between groups in SBA GMTs at T1 and T2 were determined with linear regression analyses, adjusting for titers at T0. An SBA titer ≥8 was considered as international correlate of protection. Differences between groups in proportion of participants with an SBA titer ≥8 and ≥128 was determined with χ2-tests.* P-values were adjusted for three comparisons with Bonferroni correction. Extensive results of the crude and adjusted linear regression analyses are outlined in supplementary table S1.