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ClinicalTrials.gov public records Last synced Sep 12, 2026, 1:52 AM EDT

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Showing 1–10 of 10 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: PCV21 vaccine Clear all
Active, not recruiting Phase 3 Interventional Accepts healthy volunteers

Study of a 4-Dose Regimen of a 21-valent Pneumococcal Conjugate Vaccine in Healthy Infants From Approximately 2 Months of Age

NCT06736041
View directory record Official record
Conditions
Pneumococcal Immunization
Interventions
PCV21 vaccine, Prevnar 20 vaccine, M-M-R II vaccine, RotaTeq, Vaxelis vaccine, Varivax, Hexaxim Vaccine
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
42 Days to 89 Days
Enrollment
1,714 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
66
States / cities
Glendale, Arizona • Tucson, Arizona • Fayetteville, Arkansas + 48 more
Source: ClinicalTrials.gov public record
Updated Apr 21, 2026 · Synced Sep 12, 2026, 1:52 AM EDT
Active, not recruiting Phase 3 Interventional Accepts healthy volunteers

Study of the Safety of a 21-valent Pneumococcal Conjugate Vaccine in Healthy Infants From Approximately 2 Months of Age

NCT06824194
View directory record Official record
Conditions
Pneumococcal Immunization
Interventions
PCV21 vaccine, Prevnar 20 vaccine, M-M-R II vaccine, Rotarix, RotaTeq, Vaxelis vaccine, Varivax, Priorix, VAQTA, Havrix
Biological
Lead sponsor
Sanofi
Industry
Eligibility
42 Days to 89 Days
Enrollment
2,360 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
103
States / cities
Birmingham, Alabama • Guntersville, Alabama • Oneonta, Alabama + 81 more
Source: ClinicalTrials.gov public record
Updated Apr 12, 2026 · Synced Sep 12, 2026, 1:52 AM EDT
Active, not recruiting Phase 3 Interventional Accepts healthy volunteers

Safety, Tolerability, and Immunogenicity of VAX-31 in Adults ≥50 Years With Immunobridging to Adults 18-49

NCT07284654
View directory record Official record
Conditions
Pneumococcal Vaccines
Interventions
31 valent pneumococcal conjugate vaccine, PCV20, PCV21
Biological
Lead sponsor
Vaxcyte, Inc.
Industry
Eligibility
18 Years and older
Enrollment
4,049 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
30
States / cities
Birmingham, Alabama • Chinle, Arizona • Whiteriver, Arizona + 27 more
Source: ClinicalTrials.gov public record
Updated May 14, 2026 · Synced Sep 12, 2026, 1:52 AM EDT
Recruiting Phase 4 Interventional

Assessment of Metformin for Restoration of Immune Homeostasis in HIV+ and HIV- Individuals With a History of Injection Drug Use

NCT06829238
View directory record Official record
Conditions
Systemic Inflammation, Immune Dysregulation, Injection Drug Use, HIV
Interventions
Metformin, Placebo, Jynneos, Capvaxvie
Drug · Biological
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years to 64 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2029
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Apr 21, 2026 · Synced Sep 12, 2026, 1:52 AM EDT
Active, not recruiting Phase 3 Interventional Accepts healthy volunteers

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

NCT06824181
View directory record Official record
Conditions
Pneumococcal Immunization
Interventions
PCV21 vaccine, Prevnar 20 vaccine, M-M-R II vaccine, Rotarix, RotaTeq, Vaxelis vaccine, Varivax, Priorix, VAQTA, Havrix
Biological
Lead sponsor
Sanofi
Industry
Eligibility
42 Days to 89 Days
Enrollment
580 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
17
States / cities
Los Angeles, California • Hollywood, Florida • Miami, Florida + 13 more
Source: ClinicalTrials.gov public record
Updated Feb 12, 2026 · Synced Sep 12, 2026, 1:52 AM EDT
Recruiting Phase 3 Interventional

Study of a Single Dose of a 21-valent Pneumococcal Conjugate Vaccine in Children and Adolescents With Sickle Cell Disease

NCT07247188
View directory record Official record
Conditions
Sickle Cell Disease
Interventions
PCV21, 20vPCV
Biological
Lead sponsor
Sanofi
Industry
Eligibility
2 Years to 17 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
5
States / cities
Atlanta, Georgia • Omaha, Nebraska • New Brunswick, New Jersey + 1 more
Source: ClinicalTrials.gov public record
Updated Apr 14, 2026 · Synced Sep 12, 2026, 1:52 AM EDT
Withdrawn Phase 1Phase 2 Interventional

Immune Reconstitution Monitoring and Pneumococcal Vaccination in Patients Treated With CAR-T Cells

NCT07071909
View directory record Official record
Conditions
Malignancy, Cancer, Hematological Malignancies, Lymphoma, Leukemia, Multiple Myeloma, Solid Tumor
Interventions
Commercial CAR-T, Investigational CAR-T
Biological
Lead sponsor
UNC Lineberger Comprehensive Cancer Center
Other
Eligibility
18 Years to 99 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 5, 2026 · Synced Sep 12, 2026, 1:52 AM EDT
Recruiting Phase 3 Interventional Accepts healthy volunteers

Lot-to-lot Consistency Study of a 21-valent Pneumococcal Conjugate Vaccine in Healthy Infants From 2 Months of Age

NCT07348692
View directory record Official record
Conditions
Pneumococcal Immunization, Healthy Volunteers
Interventions
PCV21 vaccine, 20vPCV licensed vaccine
Biological
Lead sponsor
Sanofi
Industry
Eligibility
42 Days to 89 Days
Enrollment
2,195 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2028
U.S. locations
13
States / cities
Fayetteville, Arkansas • Huntington Park, California • Los Angeles, California + 9 more
Source: ClinicalTrials.gov public record
Updated May 21, 2026 · Synced Sep 12, 2026, 1:52 AM EDT
Active, not recruiting Phase 3 Interventional Accepts healthy volunteers

Study of the Safety and Immunogenicity of Catch-up Vaccination With a 21-valent Pneumococcal Conjugate Vaccine (PCV21) in Healthy Infants, Toddlers, Children, and Adolescents

NCT06838000
View directory record Official record
Conditions
Pneumococcal Infections
Interventions
PCV21, 20vPCV
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
7 Months to 17 Years
Enrollment
1,268 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
17
States / cities
Paramount, California • Doral, Florida • Hialeah, Florida + 13 more
Source: ClinicalTrials.gov public record
Updated Oct 5, 2025 · Synced Sep 12, 2026, 1:52 AM EDT
Recruiting Phase 4 Interventional Accepts healthy volunteers

Induction of Cross-protective Antibodies for Serogroup 33 by Pneumococcal Conjugate Vaccines

NCT07135453
View directory record Official record
Conditions
Vaccine, Pneumococcal Disease
Interventions
Pneumococcal Vaccine
Biological
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years and older
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Aug 20, 2026 · Synced Sep 12, 2026, 1:52 AM EDT