summarizes the geometric mean titers for meningococcal serogroups A, C, W-135 and Y, as measured by hSBA (Figure 1a) and rSBA (Figure 1b). For each serogroup, results are presented in pairs, representing subjects who received MenACWY-CRM or MPSV-4, and by time period: baseline, 1 month after vaccination, and 12 months after vaccination. GMTs are expressed on a log scale, with the precise value displayed over the top of each histogram.