Overview

The main purpose of this study is to evaluate the immune response and safety of a booster dose of the meningococcal group B vaccine, rMenB+OMV NZ (also known as Bexsero), in adolescents and young adults aged 10 to 20 years. This study focuses on individuals who were first vaccinated with rMenB+OMV NZ as infants. The primary hypothesis is that a booster dose of the vaccine will elicit a stronger immune response in these primed individuals compared to those who have never received any group B meningococcal vaccine, referred to as 'nave' participants.

Eligibility

Inclusion Criteria:

Participants are eligible to be included in the study only if all of the following criteria apply:

For primed group only:

• Participated who were primed with rMenB + OMV NZ in only either 3+1 or 2+1 schedule during the first 2 years of life as confirmed by electronic or paper vaccination record.

OR

For naïve group only:

• Electronic or paper vaccination record confirmed participant who has never received any group B meningococcal vaccine and is recruited in the same country as primed participants.

For all participants:

• Participants and/or participants' parent(s)/ legally acceptable representative(s) (LAR[s]), who, in the opinion of the investigator, can and will comply with the requirements of the protocol
• Written or witnessed/thumb printed informed consent obtained from the participant / parent(s)/LAR(s) of the participant prior to performance of any study-specific procedure.
• Written informed assent obtained from the participant (if applicable) along with informed consent from the participant's parent(s)/LAR(s) prior to performing any study specific procedure.

Note: For age 10-16 years, parents or LAR to give consent along with participants, based on country regulations for participants and for >16/18 to 20 years, participants give consent independent of parents/LARs.

• A male or female between, and including, 10 and 20 years of age at the time of the first study intervention administration.
• Female participants of non-childbearing potential may be enrolled in the study. Non-childbearing potential is defined as pre-menarche, current bilateral tubal ligation or occlusion, hysterectomy, bilateral ovariectomy.
• Female participants of childbearing potential may be enrolled in the study, if the

  participant

  • has practiced adequate contraception for 1 month prior to study intervention administration, and
  • has a negative pregnancy test on the day of study intervention administration, and
  • has agreed to continue adequate contraception during the entire study treatment period.

Exclusion Criteria:

Participants are excluded from the study if any of the following criteria apply:

Medical conditions

• Current or previous, confirmed or suspected disease caused by N. meningitidis.
• Known exposure to an individual with laboratory confirmed N. meningitidis infection, within 60 days prior to enrollment.
• History of any reaction or hypersensitivity likely to be exacerbated by any component of the study intervention.
• Medical conditions representing a contraindication to intramuscular vaccination and blood draws.
• Any confirmed or suspected immunosuppressive or immunodeficient condition, based on medical history and physical examination (no laboratory testing required).
• Any other clinical condition that, in the opinion of the investigator, might pose additional risk to the participant due to participation in the study.

Prior/Concomitant therapy

• Use of any investigational or non-registered product (drug, vaccine or medical device) other than the study intervention during the period beginning 30 days before the first dose of study intervention (Day -29 to Day 1), or their planned use during the study period.
• Chronic administration of immune-modifying drugs (defined as more than 14 consecutive days in total) and/or planned use of long-acting immune-modifying treatments at any time up to the end of the study.
  • Within 90 days prior to study intervention administration: for corticosteroids, this will mean prednisone equivalent ≥20 mg/day for adult participants or >= 0.5 mg/kg/day with maximum of 20 milligram (mg)/day for pediatric participants. Inhaled and topical steroids are allowed.
  • Within 90 days prior to study intervention administration: long-acting immune-modifying drugs including among others immunotherapy (e.g., TNF-inhibitors), monoclonal antibodies, antitumoral medication.
• Administration of immunoglobulins and/or any blood products or plasma derivatives

  within 180 days prior to study intervention administration and/or planned use at any time up to the end of the study.

For primed group only:

• Participants who received additional dose(s) of group B meningococcal vaccine other than 2+1 or 3+1 schedule prior to study intervention administration.

Prior/Concurrent clinical study experience

• Concurrently participating in another clinical study, at any time during the study period, in which the participant has been or will be exposed to an investigational or a non-investigational intervention (drug/vaccine/invasive medical device).

Other exclusion criteria

• Pregnant or lactating female participant.
• Any study personnel or their immediate dependents, family, or household member.
• Child in care.