Study of Mixed Vaccination Schedules With a 21-valent Pneumococcal Conjugate Vaccine and a 20-valent Pneumococcal Conjugate Vaccine in Healthy Infants From Approximately 2 Months of Age

NCT ID: NCT06824181

Last Updated: 2025-11-10

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

PHASE3

Total Enrollment

580 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-02-27

Study Completion Date

2027-08-26

Brief Summary

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This study is a Phase 3, randomized, modified double-blind study which aims to measure whether the investigational pneumococcal conjugate vaccine PCV21 is safe and can help the body to develop germ-fighting agents called "antibodies" (immunogenicity) when it is given after 1 dose, 2 doses, or 3 doses of a licensed 20-valent pneumococcal vaccine compared to when 20-valent pneumococcal vaccine is given as a complete series in infants aged from approximately 2 months (42 to 89 days).

The study duration per participant will be up to approximately 19 months. The study vaccines (either PCV21 or 20vPCV) will be administered at approximately 2, 4, 6 and 12 to 15 months of age (MoA). Routine pediatric vaccines will be given as per local recommendations.

There will be 6 study visits:

Visit (V)01, V02 separated from V01 by 60 days, V03 separated from V02 by 60 days, V04 separated from V03 by 30 days, V05 at 12 months of age until 15 months of age, V06 separated from V05 by 30 days.

Detailed Description

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Conditions

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Pneumococcal Immunization

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

PREVENTION

Blinding Strategy

QUADRUPLE

Participants Caregivers Investigators Outcome Assessors
Modified double-blind

* Blinding for vaccine group assignment: participants and participant's parent(s) / legally acceptable representative(s) (LARs), outcome assessors, Investigators, laboratory personnel, and Sponsor study staff
* No blinding for vaccine group assignment: those preparing and administering the study interventions

Study Groups

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Group 1: 20vPCV-PCV21-PCV21-PCV21

Participants will be administered via intramuscular injection (IM) a 4-dose 20vPCV regimen at approximately 2 MoA, PCV21 at 4 MoA, PCV21 at 6 MoA and PCV21 at 12 to 15 MoA

Group Type EXPERIMENTAL

PCV21 vaccine

Intervention Type BIOLOGICAL

Pharmaceutical form:Suspension for injection-Route of administration:Intramuscular

Prevnar 20 vaccine

Intervention Type BIOLOGICAL

Pharmaceutical form:Suspension for injection-Route of administration:Intramuscular

M-M-R II vaccine

Intervention Type BIOLOGICAL

Pharmaceutical form:Powder, lyophilized, for suspension for reconstitution-Route of administration:Subcutaneous or Intramuscular

Rotarix

Intervention Type BIOLOGICAL

Pharmaceutical form:Solution-Route of administration:Oral

RotaTeq

Intervention Type BIOLOGICAL

Pharmaceutical form:Solution-Route of administration:Oral

Vaxelis vaccine

Intervention Type BIOLOGICAL

Pharmaceutical form:Suspension for injection-Route of administration:Intramuscular

Varivax

Intervention Type BIOLOGICAL

Pharmaceutical form:Powder, lyophilized, for suspension for reconstitution-Route of administration:Subcutaneous or Intramuscular

Priorix

Intervention Type BIOLOGICAL

Pharmaceutical form:Lyophilized, for suspension for reconstitution-Route of administration:Subcutaneous

VAQTA

Intervention Type BIOLOGICAL

Pharmaceutical form:Suspension for Injection-Route of administration:Intramuscular

Havrix

Intervention Type BIOLOGICAL

Pharmaceutical form:Suspension for Injection-Route of administration:Intramuscular

Group 2: 20vPCV-20vPCV-PCV21-PCV21

Participants will be administered via intramuscular injection (IM) a 4-dose 20vPCV regimen at approximately 2 MoA, 20vPCV at 4 MoA, PCV21 at 6 MoA and PCV21 at 12 to 15 MoA

Group Type EXPERIMENTAL

PCV21 vaccine

Intervention Type BIOLOGICAL

Pharmaceutical form:Suspension for injection-Route of administration:Intramuscular

Prevnar 20 vaccine

Intervention Type BIOLOGICAL

Pharmaceutical form:Suspension for injection-Route of administration:Intramuscular

M-M-R II vaccine

Intervention Type BIOLOGICAL

Pharmaceutical form:Powder, lyophilized, for suspension for reconstitution-Route of administration:Subcutaneous or Intramuscular

Rotarix

Intervention Type BIOLOGICAL

Pharmaceutical form:Solution-Route of administration:Oral

RotaTeq

Intervention Type BIOLOGICAL

Pharmaceutical form:Solution-Route of administration:Oral

Vaxelis vaccine

Intervention Type BIOLOGICAL

Pharmaceutical form:Suspension for injection-Route of administration:Intramuscular

Varivax

Intervention Type BIOLOGICAL

Pharmaceutical form:Powder, lyophilized, for suspension for reconstitution-Route of administration:Subcutaneous or Intramuscular

Priorix

Intervention Type BIOLOGICAL

Pharmaceutical form:Lyophilized, for suspension for reconstitution-Route of administration:Subcutaneous

VAQTA

Intervention Type BIOLOGICAL

Pharmaceutical form:Suspension for Injection-Route of administration:Intramuscular

Havrix

Intervention Type BIOLOGICAL

Pharmaceutical form:Suspension for Injection-Route of administration:Intramuscular

20vPCV-20vPCV-20vPCV-PCV21

Participants will be administered via intramuscular injection (IM) a 4-dose 20vPCV regimen at approximately 2 MoA, 20vPCV at 4 MoA, 20vPCV at 6 MoA and PCV21 at 12 to 15 MoA

Group Type EXPERIMENTAL

PCV21 vaccine

Intervention Type BIOLOGICAL

Pharmaceutical form:Suspension for injection-Route of administration:Intramuscular

Prevnar 20 vaccine

Intervention Type BIOLOGICAL

Pharmaceutical form:Suspension for injection-Route of administration:Intramuscular

M-M-R II vaccine

Intervention Type BIOLOGICAL

Pharmaceutical form:Powder, lyophilized, for suspension for reconstitution-Route of administration:Subcutaneous or Intramuscular

Rotarix

Intervention Type BIOLOGICAL

Pharmaceutical form:Solution-Route of administration:Oral

RotaTeq

Intervention Type BIOLOGICAL

Pharmaceutical form:Solution-Route of administration:Oral

Vaxelis vaccine

Intervention Type BIOLOGICAL

Pharmaceutical form:Suspension for injection-Route of administration:Intramuscular

Varivax

Intervention Type BIOLOGICAL

Pharmaceutical form:Powder, lyophilized, for suspension for reconstitution-Route of administration:Subcutaneous or Intramuscular

Priorix

Intervention Type BIOLOGICAL

Pharmaceutical form:Lyophilized, for suspension for reconstitution-Route of administration:Subcutaneous

VAQTA

Intervention Type BIOLOGICAL

Pharmaceutical form:Suspension for Injection-Route of administration:Intramuscular

Havrix

Intervention Type BIOLOGICAL

Pharmaceutical form:Suspension for Injection-Route of administration:Intramuscular

20vPCV-20vPCV-20vPCV-20vPCV

Participants will be administered via intramuscular injection (IM) a 4-dose 20vPCV regimen at approximately 2 MoA, 20vPCV at 4 MoA, 20vPCV at 6 MoA and 20vPCV at 12 to 15 MoA

Group Type ACTIVE_COMPARATOR

Prevnar 20 vaccine

Intervention Type BIOLOGICAL

Pharmaceutical form:Suspension for injection-Route of administration:Intramuscular

M-M-R II vaccine

Intervention Type BIOLOGICAL

Pharmaceutical form:Powder, lyophilized, for suspension for reconstitution-Route of administration:Subcutaneous or Intramuscular

Rotarix

Intervention Type BIOLOGICAL

Pharmaceutical form:Solution-Route of administration:Oral

RotaTeq

Intervention Type BIOLOGICAL

Pharmaceutical form:Solution-Route of administration:Oral

Vaxelis vaccine

Intervention Type BIOLOGICAL

Pharmaceutical form:Suspension for injection-Route of administration:Intramuscular

Varivax

Intervention Type BIOLOGICAL

Pharmaceutical form:Powder, lyophilized, for suspension for reconstitution-Route of administration:Subcutaneous or Intramuscular

Priorix

Intervention Type BIOLOGICAL

Pharmaceutical form:Lyophilized, for suspension for reconstitution-Route of administration:Subcutaneous

VAQTA

Intervention Type BIOLOGICAL

Pharmaceutical form:Suspension for Injection-Route of administration:Intramuscular

Havrix

Intervention Type BIOLOGICAL

Pharmaceutical form:Suspension for Injection-Route of administration:Intramuscular

Interventions

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PCV21 vaccine

Pharmaceutical form:Suspension for injection-Route of administration:Intramuscular

Intervention Type BIOLOGICAL

Prevnar 20 vaccine

Pharmaceutical form:Suspension for injection-Route of administration:Intramuscular

Intervention Type BIOLOGICAL

M-M-R II vaccine

Pharmaceutical form:Powder, lyophilized, for suspension for reconstitution-Route of administration:Subcutaneous or Intramuscular

Intervention Type BIOLOGICAL

Rotarix

Pharmaceutical form:Solution-Route of administration:Oral

Intervention Type BIOLOGICAL

RotaTeq

Pharmaceutical form:Solution-Route of administration:Oral

Intervention Type BIOLOGICAL

Vaxelis vaccine

Pharmaceutical form:Suspension for injection-Route of administration:Intramuscular

Intervention Type BIOLOGICAL

Varivax

Pharmaceutical form:Powder, lyophilized, for suspension for reconstitution-Route of administration:Subcutaneous or Intramuscular

Intervention Type BIOLOGICAL

Priorix

Pharmaceutical form:Lyophilized, for suspension for reconstitution-Route of administration:Subcutaneous

Intervention Type BIOLOGICAL

VAQTA

Pharmaceutical form:Suspension for Injection-Route of administration:Intramuscular

Intervention Type BIOLOGICAL

Havrix

Pharmaceutical form:Suspension for Injection-Route of administration:Intramuscular

Intervention Type BIOLOGICAL

Other Intervention Names

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515 Prevnar20™ M-M-R™ II Rotarix™ RotaTeq™ Vaxelis™ Varivax™ Priorix™ VAQTA™ Havrix™

Eligibility Criteria

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Inclusion Criteria

* Aged 42 to 89 days on the day of inclusion
* Participants who are healthy as determined by medical evaluation including medical history and physical examination
* Born at full term of pregnancy (≥ 37 weeks) and with a birth weight ≥ 2.5 kg or born after a gestation period above 28 (\> 28 weeks) through 36 weeks with a birth weight ≥ 1.5 kg, and in both cases medically stable as assessed by the investigator

Exclusion Criteria

Participants are excluded from the study if any of the following criteria apply:

* Known or suspected congenital or acquired immunodeficiency; or receipt of immunosuppressive therapy, such as anti-cancer chemotherapy or radiation therapy; or long-term systemic corticosteroid therapy
* History of microbiologically confirmed Streptococcus pneumoniae infection or disease.
* History of seizure or significant stable or progressive neurologic disorders such as inflammatory nervous system diseases, encephalopathy, cerebral palsy
* Known systemic hypersensitivity to any of the study interventions components, or history of a life-threatening reaction to the study interventions used in the study or to a product containing any of the same substances
* Thrombocytopenia, or known thrombocytopenia, as reported by the parent/legal acceptable representative (LAR), contraindicating intramuscular (IM) injection.
* Bleeding disorder, or receipt of anticoagulants in the 3 weeks preceding inclusion, contraindicating IM injection
* Chronic illness that, in the opinion of the investigator, is at a stage where it might interfere with study conduct or completion
* Moderate or severe acute illness/infection (according to investigator judgment) or febrile illness (temperature ≥ 38.0°C \[≥ 100.4°F\]) on the day of study intervention administration. A prospective participant should not be included in the study until the condition has resolved or the febrile event has subsided.
* Previous vaccination against Streptococcus pneumoniae
* Receipt of immune globulins, blood or blood-derived products since birth
* Participation at the time of study enrollment (or in the 6 weeks preceding the first study intervention administration) or planned participation during the present study period in another clinical study investigating a vaccine, drug, medical device, or medical procedure

Note: The above information is not intended to contain all considerations relevant to a potential participation in a clinical trial.
Minimum Eligible Age

42 Days

Maximum Eligible Age

89 Days

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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Sanofi

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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Kaiser Permanente Los Angeles Medical Center- Site Number : 8400025

Los Angeles, California, United States

Site Status RECRUITING

The Medici Medical Research- Site Number : 8400008

Hollywood, Florida, United States

Site Status RECRUITING

Atlantis Clinical Research- Site Number : 8400009

Miami, Florida, United States

Site Status RECRUITING

Velocity Clinical Research - Sioux City- Site Number : 8400007

Sioux City, Iowa, United States

Site Status RECRUITING

Private Practice - Dr. Michael W. Simon- Site Number : 8400001

Lexington, Kentucky, United States

Site Status RECRUITING

Velocity Clinical Research New Orleans- Site Number : 8400006

New Orleans, Louisiana, United States

Site Status RECRUITING

Finger Lakes Medical Research, PLLC- Site Number : 8400022

Cortland, New York, United States

Site Status RECRUITING

University of Rochester Medical Center- Site Number : 8400019

Rochester, New York, United States

Site Status RECRUITING

SUNY Upstate Medical University - Syracuse- Site Number : 8400015

Syracuse, New York, United States

Site Status RECRUITING

Kid's Way Pediatrics- Site Number : 8400013

Hermitage, Pennsylvania, United States

Site Status RECRUITING

Carolina Family Care - Charleston- Site Number : 8400014

Charleston, South Carolina, United States

Site Status RECRUITING

Helios Clinical Research - BUR PEDI- Site Number : 8400016

Burleson, Texas, United States

Site Status RECRUITING

DM Clinical Research - Houston - Jones Road- Site Number : 8400012

Houston, Texas, United States

Site Status RECRUITING

University of Texas Medical Branch at Galveston- Site Number : 8400005

League City, Texas, United States

Site Status RECRUITING

Investigational Site Number : 1520003

Santiago, Reg Metropolitana de Santiago, Chile

Site Status RECRUITING

Investigational Site Number : 1520002

Santiago, Reg Metropolitana de Santiago, Chile

Site Status RECRUITING

Investigational Site Number : 1520001

Santiago, Reg Metropolitana de Santiago, Chile

Site Status RECRUITING

Investigational Site Number : 4840003

León, Guanajuato, Mexico

Site Status RECRUITING

Investigational Site Number : 4840001

Mexico City, Mexico City, Mexico

Site Status RECRUITING

Investigational Site Number : 4840002

Temixco, Morelos, Mexico

Site Status RECRUITING

Investigational Site Number : 4840004

Tlaltizapán, Morelos, Mexico

Site Status RECRUITING

Investigational Site Number : 6080001

Cebu City, , Philippines

Site Status RECRUITING

Investigational Site Number : 6080002

Quezon City, , Philippines

Site Status RECRUITING

Investigational Site Number : 6080003

Quezon City, , Philippines

Site Status RECRUITING

Countries

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United States Chile Mexico Philippines

Central Contacts

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Trial Transparency email recommended (Toll free for US & Canada)

Role: CONTACT

Phone: 800-633-1610

Email: [email protected]

Related Links

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Other Identifiers

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U1111-1294-7911

Identifier Type: REGISTRY

Identifier Source: secondary_id

PSK00031

Identifier Type: -

Identifier Source: org_study_id