hSBA antibody titers were assessed for the MenA, MenC, MenW-135, and MenY serogroups respectively. The antibody cut-off value assessed was greater than or equal to ( ≥) 1:8.

The analysis was performed on the According-To-Protocol (ATP) cohort for persistence Year 1, which included all evaluable subjects who were eligible in the primary study 109375, who complied with the protocol requirements and for whom assay results for at least 1 tested antigen were available at the considered time point.

hSBA antibody titers were assessed for the MenA, MenC, MenW-135, and MenY serogroups respectively. The antibody cut-off value assessed was ≥ 1:8.

The analysis was performed on the According-To-Protocol (ATP) cohort for persistence Year 3, which included all evaluable subjects who were eligible in the primary study 109375, who complied with the protocol requirements and for whom assay results for at least 1 tested antigen were available at the considered time point.

hSBA antibody titers were assessed for the MenA, MenC, MenW-135, and MenY serogroups respectively. The antibody cut-off value assessed was ≥ 1:8.

The analysis was performed on the According-To-Protocol (ATP) cohort for persistence Year 5, which included all evaluable subjects who were eligible in the primary study 109375, who complied with the protocol requirements and for whom assay results for at least 1 tested antigen were available at the considered time point.

hSBA antibody titers were assessed for the MenA, MenC, MenW-135, and MenY serogroups respectively. The antibody cut-off value assessed was ≥ 1:4.

The analysis was performed on the According-To-Protocol (ATP) cohort for persistence Year 1, which included all evaluable subjects who were eligible in the primary study 109375, who complied with the protocol requirements and for whom assay results for at least 1 tested antigen were available at the considered time point.

hSBA antibody titers were assessed for the MenA, MenC, MenW-135, and MenY serogroups respectively. The antibody cut-off value assessed was ≥ 1:4.

The analysis was performed on the According-To-Protocol (ATP) cohort for persistence Year 3, which included all evaluable subjects who were eligible in the primary study 109375, who complied with the protocol requirements and for whom assay results for at least 1 tested antigen were available at the considered time point.

hSBA antibody titers were assessed for the MenA, MenC, MenW-135, and MenY serogroups respectively. The antibody cut-off value assessed was ≥ 1:4.

The analysis was performed on the According-To-Protocol (ATP) cohort for persistence Year 5, which included all evaluable subjects who were eligible in the primary study 109375, who complied with the protocol requirements and for whom assay results for at least 1 tested antigen were available at the considered time point.

Titers are given as geometric mean titers (GMTs) for the serogroups hSBA-MenA, hSBA-MenC, hSBAMenW-135, and hSBA-MenY respectively, calculated on all subjects.

The analysis was performed on the According-To-Protocol (ATP) cohort for persistence Year 1, which included all evaluable subjects who were eligible in the primary study 109375, who complied with the protocol requirements and for whom assay results for at least 1 tested antigen were available at the considered time point.

Titers are given as geometric mean titers (GMTs) for the serogroups hSBA-MenA, hSBA-MenC, hSBAMenW-135, and hSBA-MenY respectively, calculated on all subjects.

The analysis was performed on the According-To-Protocol (ATP) cohort for persistence Year 3, which included all evaluable subjects who were eligible in the primary study 109375, who complied with the protocol requirements and for whom assay results for at least 1 tested antigen were available at the considered time point.

Titers are given as geometric mean titers (GMTs) for the serogroups hSBA-MenA, hSBA-MenC, hSBAMenW-135, and hSBA-MenY respectively, calculated on all subjects.

The analysis was performed on the According-To-Protocol (ATP) cohort for persistence Year 5, which included all evaluable subjects who were eligible in the primary study 109375, who complied with the protocol requirements and for whom assay results for at least 1 tested antigen were available at the considered time point.

rSBA antibody titers were assessed for the MenA, MenC, MenW-135, and MenY serogroups respectively. The antibody cut-off value assessed were ≥ 1:8 and 1:128. The analysis was performed by GSK Biologicals' laboratory assay.

The analysis was performed on the According-To-Protocol (ATP) cohort for persistence Year 1, which included all evaluable subjects who were eligible in the primary study 109375, who complied with the protocol requirements and for whom assay results for at least 1 tested antigen were available at the considered time point.

rSBA antibody titers were assessed for the MenA, MenC, MenW-135, and MenY serogroups respectively. The antibody cut-off value assessed were ≥ 1:8 and 1:128. The analysis was performed by GSK Biologicals' laboratory assay.

The analysis was performed on the According-To-Protocol (ATP) cohort for persistence Year 3, which included all evaluable subjects who were eligible in the primary study 109375, who complied with the protocol requirements and for whom assay results for at least 1 tested antigen were available at the considered time point.

rSBA antibody titers were assessed for the MenA, MenC, MenW-135, and MenY serogroups respectively. The antibody cut-off values assessed were ≥ 1:8 and 1:128. Titers were determined by Public Health England (PHE) laboratory assay.

The analysis was performed on the According-To-Protocol (ATP) cohort for persistence Year 3, which included all evaluable subjects who were eligible in the primary study 109375, who complied with the protocol requirements and for whom assay results for at least 1 tested antigen were available at the considered time point.

rSBA antibody titers were assessed for the MenA, MenC, MenW-135, and MenY serogroups respectively. The antibody cut-off values assessed were ≥ 1:8 and 1:128. The analysis was performed by GSK Biologicals' laboratory assay.

The analysis was performed on the According-To-Protocol (ATP) cohort for persistence Year 5, which included all evaluable subjects who were eligible in the primary study 109375, who complied with the protocol requirements and for whom assay results for at least 1 tested antigen were available at the considered time point.

rSBA antibody titers were assessed for the MenA, MenC, MenW-135, and MenY serogroups respectively. The antibody cut-off values assessed were ≥ 1:8 and 1:128 determined by Public Health England (PHE) laboratory assay.

The analysis was performed on the According-To-Protocol (ATP) cohort for persistence Year 5, which included all evaluable subjects who were eligible in the primary study 109375, who complied with the protocol requirements and for whom assay results for at least 1 tested antigen were available at the considered time point.

Titers were given as geometric mean titers (GMTs) for the serogroups rSBA-MenA, rSBA-MenC, rSBAMenW-135, and rSBA-MenY respectively, as performed by GSK Biologicals' laboratory assay.

The analysis was performed on the According-To-Protocol (ATP) cohort for persistence Year 1, which included all evaluable subjects who were eligible in the primary study 109375, who complied with the protocol requirements and for whom assay results for at least 1 tested antigen were available at the considered time point.

Titers are given as geometric mean titers (GMTs) for the serogroups rSBA-MenA, rSBA-MenC, rSBAMenW-135, and rSBA-MenY respectively, as performed by GSK Biologicals' laboratory assay.

The analysis was performed on the According-To-Protocol (ATP) cohort for persistence Year 3, which included all evaluable subjects who were eligible in the primary study 109375, who complied with the protocol requirements and for whom assay results for at least 1 tested antigen were available at the considered time point.

Titers are given as geometric mean titers (GMTs) for the serogroups rSBA-MenA, rSBA-MenC, rSBA-MenW-135, and rSBA-MenY respectively. Titers were determined by Public Health England (PHE) laboratory assay.

The analysis was performed on the According-To-Protocol (ATP) cohort for persistence Year 3, which included all evaluable subjects who were eligible in the primary study 109375, who complied with the protocol requirements and for whom assay results for at least 1 tested antigen were available at the considered time point.

Titers are given as geometric mean titers (GMTs), calculated on all subjects for the serogroups rSBA-MenA, rSBA-MenC, rSBAMenW-135, and rSBA-MenY respectively by GSK Biologicals' laboratory assay.

The analysis was performed on the According-To-Protocol (ATP) cohort for persistence Year 5, which included all evaluable subjects who were eligible in the primary study 109375, who complied with the protocol requirements and for whom assay results for at least 1 tested antigen were available at the considered time point.

Titers are given as geometric mean titers (GMTs), calculated for all subjects for the serogroups rSBA-MenA, rSBA-MenC, rSBAMenW-135, and rSBA-MenY respectively. Titers were determined by Public Health England (PHE) laboratory assay.

The analysis was performed on the According-To-Protocol (ATP) cohort for persistence Year 5, which included all evaluable subjects who were eligible in the primary study 109375, who complied with the protocol requirements and for whom assay results for at least 1 tested antigen were available at the considered time point.

Results were tabulated as geometric mean antibody concentration (GMC) calculated on all subjects, expressed in microgram per milliliter (μg/ml).

The analysis was performed on the According-To-Protocol (ATP) cohort for persistence Year 1, which included all evaluable subjects who were eligible in the primary study 109375, who complied with the protocol requirements and for whom assay results for at least 1 tested antigen were available at the considered time point.

The cut-off values for the assay were ≥ 0.3 μg/ml and ≥ 2.0 μg/ml respectively.

The analysis was performed on the According-To-Protocol (ATP) cohort for persistence Year 1, which included all evaluable subjects who were eligible in the primary study 109375, who complied with the protocol requirements and for whom assay results for at least 1 tested antigen were available at the considered time point.

hSBA antibody titers were assessed for the MenA, MenC, MenW-135, and MenY serogroups respectively. The antibody cut-off value assessed were ≥ 1:4 or 1:8. This outcome measure only concerns the Nimenrix Naive Group.

The analysis was performed on the Booster ATP cohort for immunogenicity,which included all evaluable subjects for whom assay results were available for antibodies against at least one study vaccine antigen component for the blood sample taken before the primary vaccination with Nimenrix, of the Nimenrix Naive Group.

Titers are given as geometric mean titers (GMTs) for the serogroups hSBA-MenA, hSBA-MenC, hSBAMenW-135, and hSBA-MenY respectively. This outcome measure only concerns the Nimenrix Naive Group.

The analysis was performed on the Booster ATP cohort for immunogenicity,which included all evaluable subjects for whom assay results were available for antibodies against at least one study vaccine antigen component for the blood sample taken before the primary vaccination with Nimenrix, of the Nimenrix Naive Group.

rSBA antibody titers were assessed for the MenA, MenC, MenW-135, and MenY serogroups respectively. The antibody cut-off value assessed were ≥ 1:8 or 1:128. This outcome measure only concerns the Nimenrix Naive Group.

The analysis was performed on the Booster ATP cohort for immunogenicity,which included all evaluable subjects for whom assay results were available for antibodies against at least one study vaccine antigen component for the blood sample taken before the primary vaccination with Nimenrix, of the Nimenrix Naive Group.

Titers are given as geometric mean titers (GMTs) for the serogroups rSBA-MenA, rSBA-MenC, rSBAMenW-135, and rSBA-MenY respectively. This outcome measure only concerns the Nimenrix Naive Group.

The analysis was performed on the Booster ATP cohort for immunogenicity,which included all evaluable subjects for whom assay results were available for antibodies against at least one study vaccine antigen component for the blood sample taken before the primary vaccination with Nimenrix, of the Nimenrix Naive Group.

hSBA antibody titers were assessed for the MenA, MenC, MenW-135, and MenY serogroups respectively. The antibody cut-off values assessed were ≥ 1:4 or 1:8.

The analysis was performed on the Booster ATP cohort for immunogenicity,which included all vaccinated subjects for whom assay results were available for antibodies against at least one study vaccine antigen component for the blood sample taken one month after the primary (Nimenrix Naive Group) or booster vaccination (Nimenrix1 and Nimenrix 2 Group)

Titers were given as geometric mean titers (GMTs) for the serogroups hSBA-MenA, hSBA-MenC,hSBAMenW-135, and hSBA-MenY respectively, calculated on all subjects.

The analysis was performed on the Booster ATP cohort for immunogenicity,which included all evaluable subjects for whom assay results were available for antibodies against at least one study vaccine antigen component for the blood sample taken one month after the primary (Nimenrix Naive Group) or booster vaccination (Nimenrix 1 and Nimenrix 2 Group)

Vaccine response was defines as: for initially seronegative subjects (pre-vaccination titer < 1:4): hSBA post-vaccination antibody titers ≥ 1:8 and for seropositive subjects (pre-vaccination titers ≥ 1:4): hSBA antibody titers at least four times the pre-vaccination antibody titers.

The analysis was performed on the Booster ATP cohort for immunogenicity,which included all evaluable subjects for whom assay results were available for antibodies against at least one study vaccine antigen component for the blood sample taken one month after the primary (Nimenrix Naive Group) or booster vaccination (Nimenrix 1 and Nimenrix 2 Group)

The cut-off values for the assay were ≥1:8 and ≥1:128. Titers were determined by Public Health England (PHE) laboratory assay.

The analysis was performed on the Booster ATP cohort for immunogenicity,which included all evaluable subjects for whom assay results were available for antibodies against at least one study vaccine antigen component for the blood sample taken one month after the primary (Nimenrix Naive Group) or booster vaccination (Nimenrix 1 and Nimenrix 2 Group)

Titers are given as geometric mean titers (GMTs) for the serogroups rSBA-MenA, rSBA-MenC, rSBAMenW-135, and rSBA-MenY respectively, determined by Public Health England [PHE] laboratory assay.

The analysis was performed on the Booster ATP cohort for immunogenicity,which included all evaluable subjects for whom assay results were available for antibodies against at least one study vaccine antigen component for the blood sample taken one month after the primary (Nimenrix Naive Group) or booster vaccination (Nimenrix 1 and Nimenrix 2 Group)

Vaccine response was defined as: for initially seronegative subjects: antibody titer ≥ 1:32 at post-vaccination; and for initially seropositive subjects: antibody titer at post-vaccination ≥ 4 fold the pre-vaccination antibody titer. Titers were determined by Public Health England (PHE) laboratory assay.

The analysis was performed on the Booster ATP cohort for immunogenicity,which included all evaluable subjects for whom assay results were available for antibodies against at least one study vaccine antigen component for the blood sample taken one month after the primary (Nimenrix Naive Group) or booster vaccination (Nimenrix 1 and Nimenrix 2 Group)

Assessed solicited local symptoms were pain, redness and swelling. Any was defined as occurrence of the symptom regardless of intensity grade. Grade 3 pain was defined as pain that prevented normal activity. Grade 3 redness/swelling was defined as redness/swelling spreading beyond 50 millimeters (mm) of injection site.

The analysis was performed on the Booster Total Vaccinated cohort, which included all vaccinated subjects in this current study who had their symptom sheets filled in.

Assessed solicited general symptoms were fatigue, fever [defined as axillary temperature equal to or above 37.5 degrees Celsius (°C)], headache and gastrointestinal. Any was defined as occurrence of the symptom regardless of their intensity grade or relationship to study vaccination. Grade 3 symptom = symptom that prevented normal activity. Grade 3 fever = fever higher than (>) 39.5 °C. Related = symptom assessed by the investigator as related to the vaccination.

The analysis was performed on the Booster Total Vaccinated cohort, which included all vaccinated subjects in this current study who had their symptom sheets filled in.

An unsolicited AE covers any untoward medical occurrence in a clinical investigation subject temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product and reported in addition to those solicited during the clinical study and any solicited symptom with onset outside the specified period of follow-up for solicited symptoms. Any was defined as the occurrence of any unsolicited AE regardless of intensity grade or relation to vaccination.

The analysis was performed on the Booster Total Vaccinated cohort, which included all vaccinated subjects in this current study.

Serious adverse events (SAEs) assessed include medical occurrences that result in death, are life threatening, require hospitalization or prolongation of hospitalization or result in disability/incapacity.

The analysis was performed on the Booster Total Vaccinated cohort, which included all vaccinated subjects in this current study.

NOCIs include autoimmune disorders, asthma, type I diabetes, allergies.

The analysis was performed on the Booster Total Vaccinated cohort, which included all vaccinated subjects in this current study.