New pneumococcal vaccine for healthy infants
Official title: A PHASE 3, RANDOMIZED, DOUBLE-BLINDED TRIAL TO EVALUATE THE SAFETY AND TOLERABILITY OF A MULTIVALENT PNEUMOCOCCAL CONJUGATE VACCINE IN HEALTHY INFANTS
Run by Pfizer · NCT07573462 · Data updated 2026-11-12
A new pneumococcal vaccine is being tested in about 2-month-old healthy babies to see if it is as safe as Prevnar 20 and whether it may offer broader protection against germs that cause pneumonia, meningitis, and ear infections.
Quick facts
| Phase | Phase 3 |
|---|---|
| Study type | Interventional |
| Ages | 42 Days to 98 Days |
| Sex | All |
| Enrollment | 2400 (estimated) |
| Sponsor | Pfizer Industry-sponsored |
| Locations | 91 sites (Estero, Florida and 90 other locations) |
| Status | Recruiting |
| Started | May 4, 2026 |
| Main results expected | December 30, 2028 |
| Study ends | December 30, 2028 |
| Registry record updated | November 6, 2026 |
| Trial ID | NCT07573462 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Infants about 2 months old who are healthy by clinical assessment and have no history of severe vaccine reactions or major congenital or chronic conditions.
✕Probably not a fit
Infants with a history of severe allergic reactions to vaccines or with certain serious chronic or acute conditions may not benefit or may be excluded from participation.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This is a Phase 3 interventional trial comparing a new 20-valent pneumococcal vaccine to the currently used Prevnar 20 in healthy infants around 2 months old. Approximately 2,400 participants will be randomized into two groups to receive the vaccines and be followed for safety. The study aims to determine whether the new vaccine has a safety profile similar to Prevnar 20 and whether it may provide additional protection against pneumococcal germs not covered by existing vaccines. Enrollment is limited to healthy infants at participating centers in Florida. No collaborators beyond the sponsor are listed, and the study is led by Pfizer with multiple pediatric sites involved.
Why it matters
Potential benefit: If successful, the new vaccine could provide broader protection against pneumococcal disease while maintaining a similar safety profile.
How similar studies have gone: Other studies of pneumococcal vaccines have demonstrated safety, with ongoing exploration of broader protection in infants.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Infants who are about 2 months of age * Healthy infants determined by clinical assessment, including medical history and clinical judgment, to be eligible for the study. 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, or planned receipt through study participation.
Where it's running
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Starz Pediatrics
Estero, Florida, United States Recruiting -
Innovate Research Centers, LLC
Fort Lauderdale, Florida, United States Recruiting -
MacKoul Pediatrics Fort Myers
Fort Myers, Florida, United States Recruiting -
Speranza Research Center
Hialeah, Florida, United States Recruiting -
Dr. Gala, LLC
Miami, Florida, United States Recruiting -
Rophe Adult and Pediatric Medicine/SKYCRNG
Union City, Georgia, United States Recruiting
Show 44 more locations
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Rosemark Women Care Specialists
Idaho Falls, Idaho, United States Recruiting -
Eagle Clinical Research
Chicago, Illinois, United States Recruiting -
Kentucky Pediatric/ Adult Research
Bardstown, Kentucky, United States Recruiting -
LSU Health Shreveport Clinical Trials Office
Shreveport, Louisiana, United States Recruiting -
Ochsner LSU Health - Progressive Pediatrics
Shreveport, Louisiana, United States Recruiting -
Ochsner LSU Health Shreveport Academic Medical Center
Shreveport, Louisiana, United States Recruiting -
Ochsner LSU Health Shreveport Ambulatory Care Center
Shreveport, Louisiana, United States Recruiting -
Pediatric Associates of Fall River
Fall River, Massachusetts, United States Recruiting -
Lincoln Pediatric Group
Lincoln, Nebraska, United States Recruiting -
Boston Children's Health Physicians
Hawthorne, New York, United States Recruiting -
Maria Fareri Children's Hospital
Valhalla, New York, United States Recruiting -
Senders Pediatrics
South Euclid, Ohio, United States Recruiting -
Legacy Clinical Trials
Oklahoma City, Oklahoma, United States Recruiting -
Cyn3rgy Research Corporation
Gresham, Oregon, United States Recruiting -
Donald Guthrie Foundation
Sayre, Pennsylvania, United States Recruiting -
Guthrie Medical Group
Sayre, Pennsylvania, United States Recruiting -
Tribe Clinical Research LLC. at Parkside Pediatrics Five Forks
Simpsonville, South Carolina, United States Recruiting -
National Research Centers, Plano LLC
Plano, Texas, United States Recruiting -
Pediatric Research of Charlottesville, LLC.
Gordonsville, Virginia, United States Recruiting -
The Children's Hospital at Westmead
Westmead, New South Wales, Australia Recruiting -
Queensland Children's Hospital
Brisbane, Queensland, Australia Recruiting -
Centre for Children's Health Research
South Brisbane, Queensland, Australia Recruiting -
Monash Health
Clayton, Victoria, Australia Recruiting -
Murdoch Children's Research Institute
Parkville, Victoria, Australia Recruiting -
Perth Children's Hospital
Nedlands, Western Australia, Australia Recruiting -
The Kids Research Institute Australia
Nedlands, Western Australia, Australia Recruiting -
Milestone Research Inc.
London, Ontario, Canada Recruiting -
Bluewater Clinical Research Group Inc.
Sarnia, Ontario, Canada Recruiting -
FVR, Kokkolan rokotetutkimusklinikka
Kokkola, Keski-Pohjanmaa, Finland Recruiting -
FVR, Oulun rokotetutkimusklinikka
Oulu, North Ostrobothnia, Finland Recruiting -
FVR, Tampereen rokotetutkimusklinikka
Tampere, Pirkanmaa, Finland Recruiting -
FVR, Turun rokotetutkimusklinikka
Turku, Southwest Finland, Finland Recruiting -
FVR, Espoon rokotetutkimusklinikka
Espoo, Uusimaa, Finland Recruiting -
FVR, Etelä-Helsingin rokotetutkimusklinikka
Helsinki, Uusimaa, Finland Recruiting -
MeVac - Meilahti Vaccine Research Center
Helsinki, Uusimaa, Finland Recruiting -
FVR, Järvenpään rokotetutkimusklinikka
Jarvenpaa, Uusimaa, Finland Recruiting -
Kinder- und Jugendarztpraxis Dr. med. Michael Horn
Schönau am Königssee, Bavaria, Germany Recruiting -
Kinderärztliche Gemeinschaftspraxis Dr. med. Sören Westerholt Dr. med. Jan Matyas
Wolfsburg, Lower Saxony, Germany Recruiting -
Kinderarztpraxis Dr. Petri
Hürth, North Rhine-Westphalia, Germany Recruiting -
Private office pediatrics
Hürth, North Rhine-Westphalia, Germany Recruiting -
Dr. med. Karsten Jünger
Herxheim, Rhineland-Palatinate, Germany Recruiting -
FMZ Radowsky
Leipzig, Saxony, Germany Recruiting -
Ippokrateio General Hospital of Thessaloniki
Thessaloniki, Kentrikí Makedonía, Greece Recruiting -
Lurko-Med Kft Hazi Gyermekorvosi Rendelo
Budapest, Hungary Recruiting
+41 more sites. See ClinicalTrials.gov for the full list.
Study contacts
- Study coordinator: Pfizer CT.gov Call Center
- Email: ClinicalTrials.gov_Inquiries@pfizer.com
- Phone: 1-800-718-1021
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
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Safety and immune response of three PG4 vaccine lots vs 20vPnC in adults
This study tests three different lots of a new pneumococcal vaccine and the standard 20vPnC vaccine in adults to see if they are similarly safe and provoke a similar immune response.
-
New pneumococcal vaccine safety and immune response in children and teens
This study tests whether a new pneumococcal vaccine is as safe and as effective as Prevnar 20 in children and adolescents who have previously received PCV.
-
New pneumococcal vaccine in infants shows safety and how it stacks up against Prevnar 20
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-
Serum collection after Gamma-PN vaccination to support assay development
This project will collect blood samples from people who receive the Gamma-PN vaccine to help develop lab tests for pneumococcal disease.
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How pneumococcal conjugate vaccines may produce antibodies that protect against serogroup 33.
This will try two different pneumococcal conjugate vaccines in healthy adults to see which one makes antibodies that can kill serogroup 33 bacteria.
-
Pneumococcal Vaccine Test for severely malnourished kids in hospital
This study tests whether giving Pneumosil to children aged 6–59 months with severe acute malnutrition in hospital elicits a better immune response than a Typhoid vaccine, with follow-up visits over six months.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.