The combined percentage of subjects without bactericidal activity at 1:4 dilution using the endogenous complement human Serum Bactericidal Assay (enc-hSBA) across all strains in MenABCWY group and MenACWY group is reported at one month after the second injection. The percentage of subjects without bactericidal activity at 1:4 dilution was used to assess the effectiveness of two doses of MenABCWY vaccine when compared to one dose of Men ACWY vaccine against a panel of US N. meningitidis serogroup B invasive disease strains.

Least Square (LS)-mean computed from the generalized linear model.

Analysis was done on Full Analysis Set (FAS) effectiveness (month 3): all subjects in the All Enrolled Set who received a study vaccination and provided evaluable serum sample with enc-hSBA for at least one N. meningitidis serogroup B invasive disease strain at one month after the 2-dose series (Visit Month 3).

The combined percentage of subjects without bactericidal activity at 1:4 dilution using the endogenous complement human Serum Bactericidal Assay (enc-hSBA) across all strains in MenABCWY group and MenACWY group is reported at four months after the second injection. The percentage of subjects without bactericidal activity at 1:4 dilution was used to assess the effectiveness of two doses of MenABCWY vaccine when compared to one dose of Men ACWY vaccine against a panel of US N. meningitidis serogroup B invasive disease strains.

Least Square (LS)-mean computed from the generalized linear model.

Analysis was done on FAS effectiveness (month 6): All subjects in the All Enrolled Set who received a study vaccination and provided evaluable serum sample with enc-hSBA for at least one N. meningitidis serogroup B invasive disease strain at four months after the 2-dose series (Visit Month 6).

The combined percentage of subjects without bactericidal activity at 1:8 dilution using the endogenous complement human Serum Bactericidal Assay (enc-hSBA) across all strains in MenABCWY group and MenACWY group is reported at one month after the second injection. The percentage of subjects without bactericidal activity at 1:8 dilution was used to assess the effectiveness of two doses of MenABCWY vaccine when compared to one dose of Men ACWY vaccine against a panel of US N. meningitidis serogroup B invasive disease strains.

Least Square (LS)-mean computed from the generalized linear model.

Analysis was done on FAS effectiveness ( month 3)

The combined percentage of subjects without bactericidal activity at 1:8 dilution using the endogenous complement human Serum Bactericidal Assay (enc-hSBA) across all strains in MenABCWY group and MenACWY group is reported at four months after the second injection. The percentage of subjects without bactericidal activity at 1:8 dilution was used to assess the effectiveness of two doses of MenABCWY vaccine when compared to one dose of Men ACWY vaccine against a panel of US N. meningitidis serogroup B invasive disease strains.

Least Square (LS)-mean computed from the generalized linear model.

Analysis was done on FAS effectiveness (month 6).

The mean percentage of N. meningitidis serogroup B invasive disease strains killed by each subject, at 1:4 and 1:8 dilutions at one month after the 2-dose vaccination series is reported.

Analysis was done on FAS effectiveness (month 3)

The mean percentage of N. meningitidis serogroup B invasive disease strains killed by each subject, at 1:4 and 1:8 dilutions at four months after the 2-dose vaccination series is reported.

Analysis was done on FAS effectiveness (month 6).

The immunogenicity of two doses of MenABCWY vaccine compared to a single dose of MenACWY vaccine, in terms of percentages of subjects with enc-hSBA >= 1:4 and enc-hSBA titer >= 1:8 against four N. meningitidis serogroup B test strains at one month after the 2-dose vaccination series is reported.

Analysis was done on FAS Immunogenicity (Month 3): all subjects in the All Enrolled Set who received a study vaccination, provided evaluable serum samples respectively at 1 month post-second vaccination (Visit Month 3) whose immunogenicity assay result is available for at least one N. meningitidis serogroup B test strain or serogroups A, C, W or Y.

The immunogenicity of two doses of MenABCWY vaccine compared to a single dose of MenACWY vaccine, in terms of percentages of subjects with enc-hSBA ≥ 1:4 and enc-hSBA titer ≥ 1:8 against four N. meningitidis serogroup B test strains at four months after the 2-dose vaccination series is reported.

Analysis was done on the FAS immunogenicity (month 6). The number of participants analyzed is the number of subjects assessed for this particular endpoint.

The immunogenicity of two doses of MenABCWY compared to a single dose of MenACWY vaccine, in terms of hSBA GMTs against serogroup B test strains, at one month after the 2-dose vaccination series.

Analysis was done on FAS Immunogenicity (Month 3). The number of participants analyzed is the number of subjects assessed for this particular endpoint.

The immunogenicity of two doses of MenABCWY compared to a single dose of MenACWY vaccine, in terms of HT-hSBA GMTs against serogroup B test strains, at four months after the 2-dose vaccination series.

Analysis was done on the FAS immunogenicity (month 6). The number of participants analyzed is the number of subjects assessed for this particular endpoint.

The immunogenicity of two doses of MenABCWY compared to a single dose of MenACWY vaccine, in terms of hSBA GMTs to serogroups A, C, W, and Y, at one month after the 2-dose vaccination series.

Analysis was done on FAS Immunogenicity (Month 3)

The immunogenicity of two doses of MenABCWY compared to a single dose of MenACWY vaccine, in terms of HT-hSBA GMTs to serogroups A, C, W, and Y, at four months after the 2-dose vaccination series.

Analysis was done on the FAS immunogenicity (month 6). The number of participants analyzed is the number of subjects assessed for this particular endpoint.

The immunogenicity of two doses of MenABCWY vaccine compared to a single dose of MenACWY, in terms of the percentages of subjects with HT-hSBA titers against serogroup B test strains ≥ LLQ, at baseline(day 1) and one month after the 2-dose vaccination series, is reported. The LLQ cut off values for strains 96217, M07-0241084,M14459 and NZ98/254 were 8.6, 8.9, 8 and 8.2 respectively.

Analysis was done on the FAS immunogenicity (month 6). The number of participants analyzed is the number of subjects assessed for this particular endpoint.

The immunogenicity of two doses of MenABCWY vaccine compared to a single dose of MenACWY, in terms of the percentages of subjects with HT-hSBA titers ≥ against serogroups A, C, W, Y, at baseline(day 1) and one month after the 2-dose vaccination series.The LLQ cut off values for serogroups A,C,W and Y were 22.7,5.2,39.6 and 14.7 respectively.

Analysis was done on the FAS immunogenicity (month 6). The number of participants analyzed is the number of subjects assessed for this particular endpoint.

The immunogenicity of two doses of MenABCWY vaccine compared to a single dose of MenACWY, in terms of the percentages of subjects with HT-hSBA titers against serogroup B test strains ≥ LLQ, at four months after the 2-dose vaccination series, is reported. The LLQ cut off values for strains 96217, M07-0241084,M14459 and NZ98/254 were 8.6, 8.9, 8 and 8.2 respectively

Analysis was done on the FAS immunogenicity (month 6). The number of participants analyzed is the number of subjects assessed for this particular endpoint.

The immunogenicity of two doses of MenABCWY vaccine compared to a single dose of MenACWY, in terms of the percentages of subjects with HT-hSBA titers ≥ LLQ against serogroups A, C, W, Y at four months after the 2-dose vaccination series.The LLQ cut off values for serogroups A,C,W and Y were 22.7,5.2,39.6 and 14.7 respectively.

Analysis was done on the FAS immunogenicity (month 6). The number of participants analyzed is the number of subjects assessed for this particular endpoint.

The immunogenicity of two doses of MenABCWY vaccine compared to a single dose of MenACWY, in terms of the percentages of subjects with HT-hSBA titers against serogroup B test strains ≥ 5, ≥ 8, ≥ 16, ≥ 32, ≥ 64, ≥ 128 at four months after the 2-dose vaccination series, is reported.

Analysis was done on the FAS immunogenicity (month 6). The number of participants analyzed is the number of subjects assessed for this particular endpoint.

The immunogenicity of two doses of MenABCWY vaccine compared to a single dose of MenACWY, in terms of the percentages of subjects with HT-hSBA titers ≥ 8, ≥ 16, ≥ 32, ≥ 64, ≥ 128 against serogroups A, C, W, Y at four months after the 2-dose vaccination series.

Analysis was done on the FAS immunogenicity (month 6). The number of participants analyzed is the number of subjects assessed for this particular endpoint.

The immunogenicity of two doses of MenABCWY vaccine compared to a single dose of MenACWY, in terms of the percentages of subjects with HT-hSBA titers against serogroup B test strains ≥ 5, ≥ 8, ≥ 16, ≥ 32, ≥ 64, ≥ 128 at one month after the 2-dose vaccination series, is reported.

Analysis was done on the FAS immunogenicity (month 3). The number of participants analyzed is the number of subjects assessed for this particular endpoint.

The immunogenicity of two doses of MenABCWY vaccine compared to a single dose of MenACWY, in terms of the percentages of subjects with HT-hSBA titers ≥ 8, ≥ 16, ≥ 32, ≥ 64, ≥ 128, against serogroups A, C, W, Y, at one month after the 2-dose vaccination series.

Analysis was done on the FAS immunogenicity (month 3). The number of participants analyzed is the number of subjects assessed for this particular endpoint.

The immunogenicity of two doses of MenABCWY vaccine compared to a single dose of MenACWY, in terms of the percentages of subjects with a two-fold rise in HT-hSBA titers against the N.meningitidis serogroup B test strains, at 1 and 4 months after the 2-dose vaccination series.The 2-fold rise in titer is defined as follows:

a)for subjects with prevaccination hSBA titers \

Analysis was performed on FAS immunogenicity- month 3 and month 6. The number of participants analyzed is the number of subjects assessed for this particular endpoint.

The immunogenicity of two doses of MenABCWY vaccine compared to a single dose of MenACWY, in terms of the percentages of subjects with a 3-fold rise in HT-hSBA titers against the N.meningitidis serogroup B test strains, at 1 and 4 months after the 2-dose vaccination series.The 3-fold rise in titer is defined as follows:

a)for subjects with prevaccination hSBA titers \

Analysis was performed on FAS immunogenicity-month 3 and month 6. The number of participants analyzed is the number of subjects assessed for this particular endpoint.

The immunogenicity of two doses of MenABCWY vaccine compared to a single dose of MenACWY, in terms of the percentages of subjects with a 4-fold rise in HT-hSBA titers against the N.meningitidis serogroup B test strains, at 1 and 4 months after the 2-dose vaccination series.

The 4-fold rise in titer is defined as follows:

a)for subjects with prevaccination hSBA titers \

Analaysis was performed on FAS immunogenicity-Month 3 and Month 6. The number of participants analyzed is the number of subjects assessed for this particular endpoint.

The immunogenicity of two doses of MenABCWY vaccine compared to a single dose of MenACWY, in terms of the percentages of subjects with a two-fold rise in HT-hSBA titers against the N.meningitidis serogroups A,C,W and Y, at 1 and 4 months after the 2-dose vaccination series.

The 2-fold rise in titer is defined as follows:

a)for subjects with prevaccination hSBA titers \

Analysis was performed on FAS immunogenicity-Month 3 and Month 6. The number of participants analyzed is the number of subjects assessed for this particular endpoint.

The immunogenicity of two doses of MenABCWY vaccine compared to a single dose of MenACWY, in terms of the percentages of subjects with a three-fold rise in HT-hSBA titers against the N.meningitidis serogroups A,C,W and Y at 1 and 4 months after the 2-dose vaccination series.

The 3-fold rise in titer is defined as follows:

a)for subjects with prevaccination hSBA titers \

Analysis was performed on FAS immunogenicity-Month 3 and Month 6. The number of participants analyzed is the number of subjects assessed for this particular endpoint.

The immunogenicity of two doses of MenABCWY vaccine compared to a single dose of MenACWY, in terms of the percentages of subjects with a 4-fold rise in HT-hSBA titers against the N.meningitidis serogroups A,C,W and Y, at 1 and 4 months after the 2-dose vaccination series.

The 4-fold rise in titer is defined as follows:

a)for subjects with prevaccination hSBA titers \

Analysis was performed on FAS immunogenicity- Month 3 and Month 6. The number of participants analyzed is the number of subjects assessed for this particular endpoint.

Reactogenicity was presented in terms of number of subjects reporting solicited local and systemic AEs and other indicators.

Analysis was done on Solicited Safety Set: all subjects in the All Exposed Set who have provided any solicited adverse event data and/or other indicators or reactogenicity

Percentages of subjects reporting unsolicited AEs including serious adverse events (SAEs).

Analysis was done on the unsolicited safety set, ie, all subjects in the exposed set with any unsolicited adverse event data and/or indicators of unsolicited adverse events. Analysis for AEs leading to withdrawal was done on All Enrolled Set population.