Trial to Assess Immunogenicity and Safety of GlaxoSmithKline (GSK) Biologicals' Meningococcal ABCWY Vaccine as Compared to Meningococcal B Vaccine in Adolescents

The immunogenicity of MenABCWY vaccine, administered according to 0, 2, 6 months schedule was compared with those administered according to 0, 2 months schedule, as measured by hSBA GMTs against N. meningitidis serogroup B test strains and serogroups A,C, W and Y at 1 month after the last meningococcal vaccination. The B test strains assessed were Meningitis B NZ98/254 Ab, Meningitis B M14459 Ab, Meningitis B M07-0241084 Ab and Meningitis B 96217 Ab. This outcome measure was evaluated in the ABCWY_ 0_2 and ABCWY_0_2_6 Groups. 1 month post last meningococcal vaccination corresponds to Month 3 for ABCWY_0_2 Group and Month 7 for ABCWY_0_2_6 Group.

The immunogenicity of MenABCWY vaccine, administered according to 0, 2, 6 month schedule, was compared with those, administered according to 0, 2 month schedule, as measured by the percentages of subjects with hSBA titers ≥ LLQ against N. meningitidis serogroup B test strains at 1 month after the last meningococcal vaccination.

The immunogenicity of MenABCWY vaccine, administered according to 0, 2 months schedule, was compared with those, administered according to 0, 1 month, 0, 6 month and 0, 11 month schedules as measured by hSBA GMTs against N. meningitidis serogroups A, C, W and Y and serogroup B test strains at 1 month after the second meningococcal vaccination.

A sufficient immune response following Bexsero vaccine, administered according to 0, 2 month schedule, as measured by the percentage of subjects with hSBA titers ≥ Lower Limit of Quantitation (LLQ) against N. meningitidis serogroup B test strains at 1 month after the last meningococcal vaccination, was to be demonstrated. Criterion: the immune response was to be considered sufficient if the lower limit of the two-sided 95% CI for the percentage of subjects with hSBA titers ≥ LLQ was greater than 75% for each of the four serogroup B test strains. The test strains assessed were Meningitis B NZ98/254 Ab, Meningitis B M14459 Ab, Meningitis B M07-0241084 Ab and Meningitis B 96217 Ab.

The immunogenicity of MenABCWY vaccine, administered according to 0, 2, 6 months schedule was compared with those administered according to 0, 6 months schedule, as measured by hSBA GMTs against N. meningitidis serogroups A, C, W and Y and serogroup B test strains at 1 month after the last meningococcal vaccination.

The immunogenicity of MenABCWY vaccine, administered according to 0, 2, 6 month schedule, was compared with those, administered according to 0, 6 month schedule, as measured by the percentages of subjects with hSBA titers ≥ LLQ against serogroups A, C, W and Y and serogroup B test strains at 1 month after the last meningococcal vaccination.

The immunogenicity of MenABCWY vaccine, administered according to 0, 2 month schedule, was compared with those, administered according to 0, 1 month, 0, 6 month and 0, 11 month schedules, as measured by the percentages of subjects with hSBA titers ≥ LLQ against N. meningitidis serogroups A, C, W and Y and serogroup B test strains at 1 month after the second meningococcal vaccination.

The kinetic of immune response (at Months 0, 2, 3, 7 and 13) following different vaccination schedules as measured by the adjusted hSBA GMTs against serogroups A,C, W and Y and serogroup B test strains was assessed.

The kinetic of immune response (at Months 0, 2, 3, 7 and 13) following different vaccination schedules as measured by the percentages of subjects with hSBA titers ≥LLQ, ≥5, ≥8, ≥16, ≥32, ≥64, ≥128 against NZ98/254 B strain was assessed.

The kinetic of immune response (at Months 0, 2, 3, 7 and 13) following different vaccination schedules as measured by the percentages of subjects with hSBA titers ≥LLQ, ≥5, ≥8, ≥16, ≥32, ≥64, ≥128 against M14459 B strain was assessed.

The kinetic of immune response (at Months 0, 2, 3, 7 and 13) following different vaccination schedules as measured by the percentages of subjects with hSBA titers ≥LLQ, ≥5, ≥8, ≥16, ≥32, ≥64, ≥128 against M07-0241084 B strain was assessed.

The kinetic of immune response (at Months 0, 2, 3, 7 and 13) following different vaccination schedules as measured by the percentages of subjects with hSBA titers ≥LLQ, ≥5, ≥8, ≥16, ≥32, ≥64, ≥128 against 96217 B strain was assessed.

The kinetic of immune response (at Months 0, 2, 3, 7 and 13) following different vaccination schedules as measured by the percentages of subjects with hSBA titers ≥LLQ, ≥5, ≥8, ≥16, ≥32, ≥64, ≥128 against A human serogroup was assessed.

The kinetic of immune response (at Months 0, 2, 3, 7 and 13) following different vaccination schedules as measured by the percentages of subjects with hSBA titers ≥LLQ, ≥5, ≥8, ≥16, ≥32, ≥64, ≥128 against C human serogroup was assessed.

The kinetic of immune response (at Months 0, 2, 3, 7 and 13) following different vaccination schedules as measured by the percentages of subjects with hSBA titers ≥LLQ, ≥5, ≥8, ≥16, ≥32, ≥64, ≥128 against W human serogroup was assessed.

The kinetic of immune response (at Months 0, 2, 3, 7 and 13) following different vaccination schedules as measured by the percentages of subjects with hSBA titers ≥LLQ, ≥5, ≥8, ≥16, ≥32, ≥64, ≥128 against Y human serogroup was assessed.

The kinetic of immune response (at Months 2, 3, 7 and 13) following different vaccination schedules as measured by the percentages of subjects with two-, three- and four-fold titer rise against serogroups A, C, W and Y and serogroup B test strains was assessed. The two/three/four fold titer rise is defined as: a) for subjects with prevaccination hSBA titers ≤ LLQ, a postvaccination hSBA ≥ 2/3/4 LLQ; b) for subjects with a prevaccination hSBA titers ≥ LLQ, an increase of at least 2/3/4 times of the prevaccination hSBA titer.

The area under the curve for percentage of subjects with hSBA titers ≥ LLQ for all serogroups (A, C, W and Y) and for all serogroup B test strains (M14459, 96217, NZ98/254 and M07-0241084) was summarized overall (from Month 0 to Month 13) and by period (from Month 0 to Month 2, Month 2 to Month 3, Month 3 to Month 7 and Month 7 to Month 13) by vaccine groups. It was computed as the sum of the trapezoidal areas and the time unit used was the month. AUC 0_13 = (r0+r2)(2-0)/2 + (r2+r3)(3-2)/2 + (r3+r7)(7-3)/2 + (r7+r13)(13-7)/2 with ri = percentages of subjects with both hSBA titers >= LLQ against N. meningitis for all serogroups A, C, W and Y and for all serogroup B test strains at Month 1.

Number of participants reporting any solicited local or systemic AEs and other indicators of reactogenicity within 30 minutes after each vaccination. Assessed solicited symptoms were Pain, erythema and induration. Assessed solicited systemic symptoms were Fatigue, headache, myalgia, arthralgia, loss of appetite, nausea, chills, and fever (body temperature ≥38.0°C).

An unsolicited adverse event is an adverse event that was not solicited and that was spontaneously communicated by a participant and/or parent/legal guardian who has signed the informed consent. Number of participants reporting any unsolicited AE within 30 minutes after each vaccination.

The number of participants reporting unsolicited AEs and possibly or probably related unsolicited AEs were assessed.

Number of participants reporting any solicited local or systemic AEs and other indicators of reactogenicity from Day 1 (6 hours) to Day 7 after any meningococcal vaccination is reported.

The number of participants reporting any SAE, possibly or probably related SAE(s), medically-attended AEs, AEs leading to premature withdrawal, AEs leading to death, AEs leading to hospitalization and AEs leading to dose reduction, interruption and delay in study vaccination during the entire study period is reported.