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

Purpose

The purpose of this study is to learn about the safety, tolerability and immune effects of a pneumococcal vaccine in toddlers. Participants will take part in this study for approximately 6 or 8 months depending on which group they are assigned to. During this time participants will have 2 clinic visits and 1 phone visit for the 1-Dose group, or 3 clinic visits and 1 phone visit for the 2-Dose group. At these clinic visits, participants will be asked if any side effects were experienced. The participants will also have to give blood samples during some clinic visits.

Condition

  • Pneumococcal Disease

Eligibility

Eligible Ages
Between 12 Months and 15 Months
Eligible Genders
All
Accepts Healthy Volunteers
Yes

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 at 2, 4, and 6 months of age, with the last dose administered >56 days before enrollment into the study. Documented confirmation of receipt will be collected prior to randomization.

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.

Study Design

Phase
Phase 2
Study Type
Interventional
Allocation
Randomized
Intervention Model
Parallel Assignment
Intervention Model Description
Parallel assignment
Primary Purpose
Prevention
Masking
Triple (Participant, Investigator, Outcomes Assessor)
Masking Description
Study is partially blinded as 2 of the 3 groups are blinded and 1 is unblinded.

Arm Groups

ArmDescriptionAssigned Intervention
Experimental
PG4 1-Dose Group
Participants to receive a single injection of Multivalent Pneumococcal Vaccine
  • Biological: PG4
    Multivalent pneumococcal conjugate vaccine.
Experimental
PG4 2-Dose Group
Participants to receive two injections of Multivalent Pneumococcal Vaccine
  • Biological: PG4
    Multivalent pneumococcal conjugate vaccine.
Active Comparator
20-valent pneumococcal conjugate vaccine (20vPnC)
Participants to receive a single injection of 20-valent pneumococcal conjugate vaccine (20vPnC).
  • Biological: 20-valent pneumococcal conjugate vaccine (20vPnC)
    20-valent pneumococcal conjugate vaccine (20vPnC)
    Other names:
    • Prevnar 20

Recruiting Locations

University of Texas Medical Branch
League City, Texas 77573

More Details

Status
Recruiting
Sponsor
Pfizer

Study Contact

Pfizer CT.gov Call Center
1-800-718-1021
ClinicalTrials.gov_Inquiries@pfizer.com