A Trial to Evaluate the Safety and Reactogenicity of an Investigational Pneumococcal Vaccine in Toddlers 12 to 15 Months of Age Receiving a Single Booster Dose

NCT07406334 | Not Yet Recruiting Phase 1 DMC

• 1 other identifier: 221546
• Study Type: interventional
• Target: 45
• Locations: 0 countries
• Sites: N/A

Brief Summary

The main purpose of this study is to assess the safety and reactogenicity of a single dose of the new pneumococcal vaccine (called Pn-MAPS30plus) in toddlers who have previously completed a two-dose primary vaccination series with PCV used in local immunization program. PCV20 will be used as a comparator for this study.

Conditions

Pneumonia, Bacterial

Keywords

Pneumococcal Vaccine; Phase 1; Pediatric; Booster dose

Outcome Measures

Primary Outcomes (5)

• Number of Participants with Solicited Administration site Adverse Events (AEs)

  The AEs considered are tenderness, redness, and swelling at the administration site.

  Day 1 to Day 7

• Number of Participants with Solicited Systemic Adverse Events (AEs)

  The AEs considered are fever, irritability, loss of appetite and somnolence (sleepiness/drowsiness).

  Day 1 to Day 7

• Number of Participants with Unsolicited AEs

  An unsolicited AE is an AE that was either not included in the list of solicited events or could be included in the list of solicited events but with an onset outside the specified period of follow-up for solicited events.

  Day 1 to Day 30

• Number of Participants with Serious AEs (SAEs), Adverse Events of Special Interest (AESIs) and AEs Leading to Withdrawal

  Day 1 up to trial end (Month 6)

• Number of Participants with Hematological and Biochemical Laboratory Abnormalities

  On Day 8 compared to Day 1 (pre-vaccination)

Study Arms (2)

Pn-MAPS30plus Group

EXPERIMENTAL

Participants receive a single dose of Pn-MAPS30plus on Day 1.

Biological: Pn-MAPS30plus

PCV20 Group

ACTIVE COMPARATOR

Participants receive a single dose of PCV20 on Day 1.

Combination Product: PCV20

Interventions

Pn-MAPS30plus BIOLOGICAL

Pn-MAPS30plus vaccine will be administered intramuscularly.

Pn-MAPS30plus Group

PCV20 COMBINATION_PRODUCT

PCV20 vaccine will be administered intramuscularly.

PCV20 Group

Eligibility Criteria

• Age: 12 Months - 15 Months
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Child (0-17)

You may qualify if:

• Participants' parent(s)/Legally acceptable representative \[LAR(s)\] who, in the opinion of the investigator, can and will comply with all protocol requirements.
• Written or witnessed/thumb printed informed consent obtained from the participants' parent(s)/LAR(s) prior any study-specific procedure is performed.
• A male or female between, and including, 12 to15 Months of age at the time of the study intervention administration.
• Healthy participants or medically stable patients as established by medical history and clinical examination before entering the study.
• To the best knowledge of the participant's parent(s)/LAR(s), the child has been eligible for pneumococcal vaccination and has completed a 2-dose primary series with PCV10.

You may not qualify if:

• History of any reaction or hypersensitivity likely to be exacerbated by any component of the study intervention(s).
• Hypersensitivity to latex.
• History of microbiologically proven Invasive pneumococcal Disease (IPD).
• Any confirmed or suspected immunosuppressive or immunodeficient condition, based on medical history and physical examination.
• Major congenital defects, as assessed by the investigator.
• Recurrent history or uncontrolled neurological disorders or any neuroinflammatory condition, congenital neurological conditions, encephalopathies, or seizures.
• Condition that in the judgment of the investigator would make intramuscular injection unsafe.
• Any other clinical condition that, in the opinion of the investigator, might pose additional risk to the participant due to participation in the study.
• Use of any investigational or non-registered product (drug, vaccine, or invasive medical device) during the period beginning 30 days before the dose of study intervention(s), or their planned use during the trial period.
• Previous vaccination with any pneumococcal vaccine other than PCV10.
• Previous receipt of more than 2 pneumococcal vaccine doses (primary series or booster).
• Planned administration/administration of any inactivated or otherwise non-live vaccine in the period starting 14 days before and ending 14 days after the dose of study intervention administration or planned administration/administration of any live vaccine in the period starting 28 days before and ending 28 days after the dose of study intervention administration, with the exception of inactivated influenza vaccine which may be administered but must be given at least 7 days before or 15 days after receipt of any study intervention.
• Receipt of blood or plasma products or immunoglobulins, from 90 days before study intervention administration, or planned receipt up to 30 days of study intervention administration.
• Chronic administration of immune-modifying drugs and/or planned use of long-acting immune-modifying treatments at any time up to the end of the study.
• For corticosteroids: prednisone equivalent ≥0.5 mg/kg/day (maximum 20 mg/day) within 90 days prior for pediatric participants.

Sponsors & Collaborators

• GlaxoSmithKline: lead

MeSH Terms

Conditions

Pneumonia, Bacterial

Condition Hierarchy (Ancestors)

Bacterial Infections; Bacterial Infections and Mycoses; Infections; Pneumonia; Respiratory Tract Infections; Lung Diseases; Respiratory Tract Diseases

Central Study Contacts

US GSK Clinical Trials Call Center

CONTACT

877-379-3718; GSKClinicalSupportHD@gsk.com

EU GSK Clinical Trials Call Center

CONTACT

+44 (0) 20 89904466; GSKClinicalSupportHD@gsk.com

Study Design

• Study Type: interventional
• Phase: phase 1
• Allocation: RANDOMIZED
• Masking: TRIPLE
• Who Masked: PARTICIPANT, INVESTIGATOR, OUTCOMES ASSESSOR
• Masking Details: This is an observer-blind study.
• Purpose: PREVENTION
• Intervention Model: PARALLEL
• Sponsor Type: INDUSTRY
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: February 6, 2026
• First Posted: February 12, 2026
• Study Start: May 15, 2026
• Primary Completion (Estimated): February 22, 2027
• Study Completion (Estimated): February 22, 2027
• Last Updated: February 12, 2026

Record last verified: 2026-02

Data Sharing

• IPD Sharing: Will share
• Shared Documents: STUDY PROTOCOL, SAP, ICF, CSR
• Time Frame: Anonymized IPD will be made available within 6 months of publication of primary, key secondary and safety results for studies in product with approved indication(s) or asset(s) with development terminated across all indications.
• Access Criteria: Anonymized IPD is shared with researchers whose proposals are approved by an 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 may be granted, when justified, for up to 6 months.