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A Study to Learn About How a New Pneumococcal Vaccine Works in Children

A PHASE 2, RANDOMIZED, PARTIALLY DOUBLE-BLIND TRIAL TO EVALUATE THE SAFETY, TOLERABILITY, AND IMMUNOGENICITY OF A MULTIVALENT PNEUMOCOCCAL CONJUGATE VACCINE ADMINISTERED IN HEALTHY TODDLERS 12 THROUGH 15 MONTHS OF AGE

Status
Unknown
Phases
Phase 2
Study type
Interventional
Source
EU CTR
Registry ID
EUCTR2025-000101-16-Outside-EU/EEA
Enrollment
Unknown
Registered
2026-06-10
Start date
Unknown
Completion date
Unknown
Last updated
2026-06-15

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Pneumococcal Disease

Interventions

Product Name: PF-07872412 Pharmaceutical Form: Suspension for injection INN or Proposed INN: PNEUMOCOCCAL POLYSACCHARIDE SEROTYPE 1 CONJUGATED TO CRM197 ADSORBED ON ALUMINIUM PHOSPHATE Other descripti

Sponsors

Pfizer, Inc
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: -Male or female toddlers =12 to =15 months of age at the time of consent. -Healthy toddlers determined by clinical assessment, including medical history and clinical judgment, to be eligible for the study. -Have received 3 infant doses of 20vPnC with the last dose administered >56 days before enrollment into the study. Documented confirmation of receipt will be collected prior to randomization. Are the trial subjects under 18? yes Number of subjects for this age range: 225 F.1.2 Adults (18-64 years) no F.1.2.1 Number of subjects for this age range F.1.3 Elderly (>=65 years) no F.1.3.1 Number of subjects for this age range

Exclusion criteria

Exclusion criteria: -History of severe adverse reaction associated with a vaccine and/or severe allergic reaction (eg, anaphylaxis). -Major known congenital malformation or serious chronic disorder. -Other acute or chronic medical or psychiatric condition or laboratory abnormality that may increase the risk associated with study participation or investigational product administration or may interfere with the interpretation of study results and, in the judgment of the investigator, would make the participant inappropriate for entry into this study. -Previous vaccination with any licensed or investigational pneumococcal vaccine (other than 20vPnC) or planned receipt during study participation.

Design outcomes

Primary

MeasureTime frame
Main Objective: To evaluate the safety and tolerability profile of a fourth-generation multivalent pneumococcal conjugate vaccine (PG4) administered to toddlers =12 to =15 months of age;Secondary Objective: To describe the immune responses elicited by PG4;Primary end point(s): -Percentage of participants reporting prespecified local reactions within 7 days after each dose -Percentage of participants reporting prespecified systemic events within 7 days after each dose -Percentage of participants reporting Adverse Events (AEs) within 1 month after the last assigned vaccination -Percentage of participants reporting Serious Adverse Events (SAEs) within 6 months after vaccination;Timepoint(s) of evaluation of this end point: 7 days after each dose 1 month after the last assigned vaccination 6 months after vaccination

Secondary

MeasureTime frame
Secondary end point(s): -Pneumococcal serotype specific IgG concentrations 1 month after last assigned vaccination;Timepoint(s) of evaluation of this end point: 1 month after last assigned vaccination

Countries

United States

Contacts

Public ContactClinical Trials.gov Call Center

Pfizer, Inc

ClinicalTrials.gov_Inquiries@Pfizer.com

Outcome results

None listed

Source: EU CTR (via WHO ICTRP) · Data processed: Jun 21, 2026