A Study on the Safety, Tolerability and Immune Response of Meningococcal Combined ABCWY Vaccine in Healthy Infants

A Phase II, Randomized, Partially Blinded Study to Assess the Safety, Tolerability and Immunogenicity of Meningococcal Combined ABCWY Vaccine When Administered to Healthy Infants

The purpose of this study is to assess the safety, tolerability and immunogenicity of the combined meningococcal groups A, B, C, W and Y (MenACWY-7b) vaccine intended to protect against invasive meningococcal disease (IMD) caused by all 5 meningococcal serogroups, in healthy infants 2 months of age (MoA) at enrolment.

Study Overview

• Status: Completed
• Conditions: Infections, Meningococcal
• Intervention / Treatment: Combination product: MenACWY-7B low dose vaccine; Combination product: MenB vaccine; Combination product: MenACWY-TT vaccine; Combination product: MenACWY-7B high dose vaccine; Combination product: MenABCWY-1Gen vaccine

• Study Type: Interventional
• Enrollment (Actual): 726
• Phase: Phase 2

Contacts and Locations

Study Locations

• Dominican Republic
  • Santo Domingo Este, Dominican Republic
    • GSK Investigational Site
• Finland
  • Espoo, Finland, 02230
    • GSK Investigational Site
  • Helsinki, Finland, 00100
    • GSK Investigational Site
  • Jarvenpaa, Finland, 04400
    • GSK Investigational Site
  • Kokkola, Finland, 67100
    • GSK Investigational Site
  • Oulu, Finland, 90220
    • GSK Investigational Site
  • Seinäjoki, Finland, 60100
    • GSK Investigational Site
• Germany
  • Gilching, Germany, 82205
    • GSK Investigational Site
  • Schönau am Königssee, Germany, 83471
    • GSK Investigational Site
• Honduras
  • San Pedro Sula, Honduras, 21101
    • GSK Investigational Site
• Poland
  • Bydgoszcz, Poland, 85-048
    • GSK Investigational Site
  • Krakow, Poland, 30-348
    • GSK Investigational Site
  • Krakow, Poland, 30-644
    • GSK Investigational Site
  • Luboń, Poland, 62-030
    • GSK Investigational Site
  • Siemianowice Śląskie, Poland, 41-103
    • GSK Investigational Site
  • Torun, Poland, 87-100
    • GSK Investigational Site
  • Trzebnica, Poland, 55-100
    • GSK Investigational Site
  • Warsaw, Poland, 02-647
    • GSK Investigational Site
  • Wroclaw, Poland, 50368
    • GSK Investigational Site
• South Africa
  • Parow Valley, South Africa, 7505
    • GSK Investigational Site
  • Soweto Gauteng, South Africa, 2013
    • GSK Investigational Site
• Spain
  • Almería, Spain, 04120
    • GSK Investigational Site
  • Burgos, Spain, 09006
    • GSK Investigational Site
  • Madrid, Spain, 28041
    • GSK Investigational Site
  • Madrid, Spain, 28040
    • GSK Investigational Site
  • Madrid, Spain, 28046
    • GSK Investigational Site
  • Madrid, Spain, 28222
    • GSK Investigational Site
  • Marbella, Spain, 29600
    • GSK Investigational Site
  • Málaga, Spain, 29004
    • GSK Investigational Site
  • Santiago de Compostela, Spain, 15706
    • GSK Investigational Site
  • Seville, Spain, 41013
    • GSK Investigational Site
• United Kingdom
  • Exeter, United Kingdom, EX2 5DW
    • GSK Investigational Site
  • Oxford, United Kingdom, OX3 7LE
    • GSK Investigational Site

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 1 month to 2 months (Child)
• Accepts Healthy Volunteers: Yes

Description

Inclusion Criteria:

• 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 parent(s)/LAR(s) of the participant prior to performance of any study specific procedure.
• Healthy participants as established by medical history and clinical examination before entering into the study.
• A male or female between, and including, 55 and 89 days of age (approximately 2 MoA) at the time of the first study vaccination.
• Born after a gestation period of ≥37 weeks, with a birth weight ≥2.5 kg.

Exclusion Criteria:

Medical conditions

• Current or previous, confirmed or suspected disease caused by N. meningitidis.
• Household contact with and/or intimate exposure to an individual with laboratory confirmed N. meningitidis infection from birth.
• Progressive, unstable or uncontrolled clinical conditions.
• Clinical conditions representing a contraindication to intramuscular vaccination and blood draws.
• Any neuroinflammatory disorders, congenital and peripartum neurological conditions, encephalopathies, seizures.
• Congenital or peripartum disorders resulting in a chronic condition
• Major congenital defects, as assessed by the investigator.
• History of any reaction or hypersensitivity likely to be exacerbated by any component of the vaccine(s)/product(s).
• Hypersensitivity, including allergy, to any component of vaccines, including diphtheria toxoid (CRM197) and latex medicinal products or medical equipment whose use is foreseen in this study.
• Abnormal function or modification of the immune system resulting from:
• Autoimmune disorders or immunodeficiency syndromes.
• Systemic administration of corticosteroids (PO/IV/IM) for more than 14 consecutive days starting from birth until Visit 5. This will mean prednisone equivalent ≥0.5 mg/kg/day with maximum 20 mg/day. Inhaled and topical steroids are allowed.
• Administration of antineoplastic and immunomodulating agents or radiotherapy from birth.
• Administration of long-acting immune-modifying drugs at any time during the study period.
• 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 vaccines from birth, or planned use during the study period.
• Previous vaccination with any meningococcal vaccine.
• Administration of immunoglobulins and/or any blood products or plasma derivatives from birth or planned administration during the study period until Visit 5.
• Chronic administration (defined as more than 14 days in total) of immunosuppressants or other immune-modifying drugs during the period starting from birth until Visit 5. For corticosteroids, this will mean prednisone equivalent ≥0.5 mg/kg/day with maximum 20 mg/day. Inhaled and topical steroids are allowed.

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 vaccine/product (drug or medical device).

Other exclusions

• Child in care.
• Study personnel as an immediate family or household member.
• For contraindications to administering routine vaccines foreseen in the study, refer to their approved product label/package insert.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Prevention
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: None (Open Label)

Number of Arms

4

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: MenACWY-7B low dose Group; Participants received a single dose of the MenACWY-7B low dose vaccine on Day 1, Day 61 and Day 301.	Combination product: MenACWY-7B low dose vaccine; MenACWY-7B low dose vaccine is administered intramuscularly in the upper thigh region of the right leg.
Active Comparator: MenB+MenACWY-TT Group; Participants received a single dose of the meningococcal group B (MenB) vaccine and the meningococcal serogroups A, C, W-135, Y tetanus toxoid conjugate (MenACWY-TT) vaccine on Day 1, Day 61 and Day 301.	Combination product: MenB vaccine; MenB vaccine is administered intramuscularly in the upper thigh region of the right leg.; Other Names: Bexsero; Combination product: MenACWY-TT vaccine; MenACWY-TT vaccine is administered intramuscularly in the lower thigh region of the right leg.; Other Names: Nimenrix
Experimental: MenACWY-7B high dose Group; Participants received a single dose of the MenACWY-7B high dose vaccine on Day 1, Day 61 and Day 301.	Combination product: MenACWY-7B high dose vaccine; MenACWY-7B high dose vaccine is administered intramuscularly in the upper thigh region of the right leg.
Experimental: ABCWY-1Gen Group; Participants received a single dose of the MenABCWY-1Gen vaccine on Day 1, Day 61 and Day 301.	Combination product: MenABCWY-1Gen vaccine; MenABCWY-1Gen vaccine is administered intramuscularly in the upper thigh region of the right leg.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Number of Participants Reporting Any Solicited Administration Site Events After the First Vaccination Administered on Day 1	The solicited administration site events include tenderness (administration site pain), erythema (redness), induration and swelling. Any solicited administration site events = occurrence of the event regardless of intensity grade. Data for solicited administration site events is presented for each intervention administered in each arm group.	From Day 1 to Day 7
Number of Participants Reporting Any Solicited Systemic Events After the First Vaccination Administered on Day 1	The solicited systemic events included diarrhoea, drowsiness (somnolence), fever (pyrexia), irritability/fussiness, loss of appetite, and vomiting. Fever is defined as temperature >38.0°C/100.4°F. Any solicited systemic events = occurrence of the event regardless of intensity grade.	From Day 1 to Day 7
Number of Participants Reporting Any Solicited Administration Site Events After the Second Vaccination Administered on Day 61		From Day 61 to Day 67
Number of Participants Reporting Any Solicited Systemic Events After the Second Vaccination Administered on Day 61		From Day 61 to Day 67
Number of Participants Reporting Any Solicited Administration Site Events After the Third Vaccination Administered on Day 301		From Day 301 to Day 307
Number of Participants Reporting Any Solicited Systemic Events After the Third Vaccination Administered on Day 301		From Day 301 to Day 307
Number of Participants Reporting Any Unsolicited Adverse Events (AEs) After the First Vaccination Administered on Day 1	Unsolicited AEs includes any AE reported in addition to those solicited during the clinical study. Also, any 'solicited' symptom with onset outside the specified period of follow-up for solicited symptoms is reported as an unsolicited adverse event. Assessed unsolicited AEs include serious adverse events (SAEs), AEs leading to withdrawal, AEs of special interest (AESIs), and medically attended AEs (MAAEs). Any = occurrence of the event regardless of the intensity grade.	From Day 1 to Day 30
Number of Participants Reporting Any Unsolicited AEs After the Second Vaccination Administered on Day 61		From Day 61 to Day 90
Number of Participants Reporting Any Unsolicited AEs After the Third Vaccination Administered on Day 301		From Day 301 to Day 330
Number of Participants Reporting MAAEs, SAEs, AEs Leading to Withdrawal, and AESIs	MAAEs are defined as symptoms or illnesses requiring a hospitalization, or an emergency room visit, or visit to/by a health care provider. An SAE is any untoward medical occurrence that results in death, is life-threatening, requires hospitalization or prolongation of existing hospitalization or results in disability/incapacity. AESIs are predefined (serious or non-serious) AEs of scientific and medical concern specific to the product or program, for which ongoing monitoring and rapid communication by the investigator to the sponsor can be appropriate, because such an event might warrant further investigation in order to characterize and understand it. AEs leading to withdrawal are defined as AEs due which the participant is considered to have withdrawn from the study as no new study procedure has been performed or no new information has been collected for them since the date of withdrawal/last contact.	From Day 1 to Day 481
Percentage of Participants With Human Serum Bactericidal Assay (hSBA) Titers ≥ Lower Limit of Quantitation (LLOQ) for Each Serogroup B Indicator Strain at 1 Month After the Second Vaccination	The immune response to the MenACWY-7B vaccine (low and high dose), the MenABCWY-1Gen vaccine and the MenB vaccine was evaluated by measuring bactericidal activity using an hSBA against all serogroup B indicator strains fHbp, NadA, NHBA, PorA, fHbp V1.13, fHbp V2 and fHbp V3.	At Day 91 (1 month after the second vaccination)
Percentage of Participants With hSBA Titers ≥ LLOQ for Each Serogroup B Indicator Strain at Pre-third Vaccination		At Day 301 (pre-third vaccination)
Percentage of Participants With hSBA Titers ≥ LLOQ for Each Serogroup B Indicator Strain at 1 Month After the Third Vaccination		At Day 331 (1 month after the third vaccination)
hSBA Geometric Mean Titers (GMTs) for Each Serogroup B Indicator Strain at 1 Month After the Second Vaccination	The immune response to the MenACWY-7B vaccine (low and high dose), the MenABCWY-1Gen vaccine and the MenB vaccine against serogroup B indicator strains is determined using hSBA GMTs.	At Day 91 (1 month after the second vaccination)
hSBA GMTs for Each Serogroup B Indicator Strain at Pre-third Vaccination		At Day 301 (pre-third vaccination)
hSBA GMTs for Each Serogroup B Indicator Strain at 1 Month After the Third Vaccination		At Day 331 (1 month after the third vaccination)
hSBA Geometric Mean Ratios (GMRs) for Each Serogroup B Indicator Strain	The immune response to the MenACWY-7B vaccine (low and high dose), the MenABCWY-1Gen vaccine and the MenB vaccine against serogroup B indicator strains is determined using hSBA GMRs. Within-group ratios of hSBA GMTs against each of the N.meningitidis serogroup B indicator strain at Day 331 compared to Day 301.	At Day 331 (1 month after the third vaccination) compared to Day 301 (pre-third vaccination)
Percentage of Participants With hSBA Titers ≥ LLOQ for Each A, C, W and Y Serogroup at 1 Month After the Second Vaccination	The immune response to the MenACWY-7B vaccine (low and high dose), the MenABCWY-1Gen vaccine and the MenACWY-TT vaccine is evaluated by measuring bactericidal activity using an hSBA against serogroups A, C, W and Y.	At Day 91 (1 month after the second vaccination)
Percentage of Participants With hSBA Titers ≥ LLOQ for Each A, C, W and Y Serogroup at Pre-third Vaccination		At Day 301 (pre-third vaccination)
Percentage of Participants With hSBA Titers ≥ LLOQ for Each A, C, W and Y Serogroup at 1 Month After the Third Vaccination		At Day 331 (1 month after the third vaccination)
hSBA GMTs for Each A, C, W and Y Serogroup at 1 Month After the Second Vaccination	The immune response to the MenACWY-7B vaccine (low and high dose), the MenABCWY-1Gen vaccine and the MenACWY-TT vaccine against serogroups A, C, W and Y is determined using hSBA GMTs.	At Day 91 (1 month after the second vaccination)
hSBA GMTs for Each A, C, W and Y Serogroup at Pre-third Vaccination		At Day 301 (pre-third vaccination)
hSBA GMTs for Each A, C, W and Y Serogroup at 1 Month After the Third Vaccination		At Day 331 (1 month after the third vaccination)
hSBA GMRs for Each A, C, W and Y Serogroup		At Day 331 (1 month after the third vaccination) compared to Day 301 (pre-third vaccination)

Collaborators and Investigators

• Sponsor: GlaxoSmithKline

Study record dates

Study Major Dates

• Study Start (Actual): November 29, 2021
• Primary Completion (Actual): March 31, 2025
• Study Completion (Actual): March 31, 2025

Study Registration Dates

• First Submitted: October 7, 2021
• First Submitted That Met QC Criteria: October 7, 2021
• First Posted (Actual): October 18, 2021

Study Record Updates

• Last Update Posted (Actual): June 26, 2026
• Last Update Submitted That Met QC Criteria: June 2, 2026
• Last Verified: June 1, 2026

More Information

Terms related to this study

• Keywords: Safety; Immunogenicity; Tolerability; Bexsero; Healthy infants; Invasive Meningococcal Disease; MenABCWY-1Gen; Nimenrix; MenACWY-7B
• Additional Relevant MeSH Terms: Infections; Bacterial Infections; Bacterial Infections and Mycoses; Gram-Negative Bacterial Infections; Neisseriaceae Infections; Meningococcal Infections; Biological Products; Complex Mixtures; Vaccines; 4CMenB vaccine; tetravalent meningococcal serogroups A, C, W-135 and Y tetanus toxoid conjugate vaccine
• Other Study ID Numbers: 217043; 2021-001367-24 (EudraCT Number); 2023-506449-40-00 (Ctis)

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: YES
• IPD Plan Description: IPD for this study will be made available via the Clinical Study Data Request site.
• IPD Sharing Time Frame: IPD will be made available within 6 months of publishing the results of the primary endpoints, a key secondary endpoints and safety data of the study.
• IPD Sharing Access Criteria: Access is provided after a research proposal is submitted and has received approval from the Independent Review Panel and after a Data Sharing Agreement is in place. Access is provided for an initial period of 12 months but an extension can be granted, when justified, for up to another 12 months.
• IPD Sharing Supporting Information Type: STUDY_PROTOCOL; SAP; ICF; CSR

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: Yes
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No