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Showing 1–24 of 400 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: COVID-19 Vaccine Clear all
Completed No phase listed Observational

Observational Maternal COVID-19 Vaccination Study

NCT04826640
View directory record Official record
Conditions
Pregnancy
Interventions
Observational
Other
Lead sponsor
Duke University
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
146 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
4
States / cities
Atlanta, Georgia • Boston, Massachusetts • Durham, North Carolina + 1 more
Source: ClinicalTrials.gov public record
Updated Jul 9, 2025 · Synced Sep 17, 2026, 5:15 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

Universal Anti-Viral Vaccine for Healthy Elderly Adults

NCT04441047
View directory record Official record
Conditions
Virus Diseases, Pneumonia, COVID-19 Respiratory Infection, RSV Pneumonia, Influenza, Human, ARDS, Human
Interventions
AlloStim
Drug
Lead sponsor
Mirror Biologics, Inc.
Industry
Eligibility
65 Years and older
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2024
U.S. locations
4
States / cities
Delray Beach, Florida • Miami, Florida • Tampa, Florida + 1 more
Source: ClinicalTrials.gov public record
Updated Jan 13, 2025 · Synced Sep 17, 2026, 5:15 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Efficacy and Safety of COVID-19 Vaccine in Cancer Patients

NCT04865133
View directory record Official record
Conditions
COVID-19 Infection, Malignant Solid Neoplasm
Interventions
Biospecimen Collection, Electronic Health Record Review
Procedure · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
89 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Dec 9, 2024 · Synced Sep 17, 2026, 5:15 AM EDT
Completed Phase 2 Interventional Results available

DC Vaccine Combined With IL-2 and IFNα-2a in Treating Patients With mRCC

NCT00085436
View directory record Official record
Conditions
Kidney Cancer
Interventions
Aldesleukin,, autologous tumor cell vaccine, recombinant interferon alfa
Biological
Lead sponsor
Dartmouth-Hitchcock Medical Center
Other
Eligibility
18 Years and older
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2009
U.S. locations
1
States / cities
Lebanon, New Hampshire
Source: ClinicalTrials.gov public record
Updated Jun 25, 2018 · Synced Sep 17, 2026, 5:15 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Discussing COVID-19 Vaccines in Private Facebook Groups

NCT05422898
View directory record Official record
Conditions
COVID-19
Interventions
Gist messages on COVID-19 vaccination, COVID-19 vaccine information
Behavioral
Lead sponsor
George Washington University
Other
Eligibility
18 Years and older
Enrollment
508 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Jun 20, 2022 · Synced Sep 17, 2026, 5:15 AM EDT
Terminated Phase 1 Interventional

Dendritic Cell Vaccine Therapy With In Situ Maturation in Pediatric Brain Tumors

NCT01902771
View directory record Official record
Conditions
Glioma, Brain Cancer, Brain Tumor, Glioblastoma Multiforme, High Grade Glioma
Interventions
Dendritic Cell Vaccine, Tumor Lysate, Imiquimod, Leukapheresis
Biological · Other · Procedure
Lead sponsor
Edward Ziga
Other
Eligibility
1 Year to 29 Years
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2017
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Mar 9, 2017 · Synced Sep 17, 2026, 5:15 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

COVID-19 Vaccines International Pregnancy Exposure Registry

NCT04705116
View directory record Official record
Conditions
Covid19
Interventions
COVID-19 vaccine
Biological
Lead sponsor
Pregistry
Industry
Eligibility
18 Years to 50 Years · Female only
Enrollment
1,184 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jul 16, 2026 · Synced Sep 17, 2026, 5:15 AM EDT
Terminated Phase 1 Interventional Accepts healthy volunteers Results available

Dose Ranging Trial to Assess Safety and Immunogenicity of V590 (COVID-19 Vaccine) in Healthy Adults (V590-001)

NCT04569786
View directory record Official record
Conditions
Coronavirus Disease (COVID-19)
Interventions
V590, Placebo
Biological · Other
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
18 Years and older
Enrollment
232 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
7
States / cities
Tempe, Arizona • Miami, Florida • South Miami, Florida + 4 more
Source: ClinicalTrials.gov public record
Updated Dec 28, 2021 · Synced Sep 17, 2026, 5:15 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Simultaneous mRNA COVID-19 and IIV4 Vaccination Study

NCT05028361
View directory record Official record
Conditions
Quality of Life, Injection Site Reaction, Adverse Drug Event, Systemic Reaction
Interventions
mRNA COVID-19, IIV4, Placebo (saline)
Biological · Other
Lead sponsor
Duke University
Other
Eligibility
5 Years and older
Enrollment
348 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
3
States / cities
Baltimore, Maryland • Durham, North Carolina • Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 18, 2024 · Synced Sep 17, 2026, 5:15 AM EDT
Enrolling by invitation Phase 2 Interventional

DMSO Dual-Route Therapy for Refractory Tinnitus in Long-COVID and Post-COVID-19 Vaccine Injury

NCT07567274
View directory record Official record
Conditions
Tinnitus
Interventions
DMSO-based otic solution with betahistine, dexamethasone, and lidocaine, DMSO-based transdermal cream with levocarnitine and N-acetylcysteine
Drug
Lead sponsor
Leading Edge Clinic
Other
Eligibility
18 Years to 70 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Ithaca, New York
Source: ClinicalTrials.gov public record
Updated May 12, 2026 · Synced Sep 17, 2026, 5:15 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Comparative Immunogenicity of Concomitant vs Sequential mRNA COVID-19 and Influenza Vaccinations

NCT06020118
View directory record Official record
Conditions
Influenza, COVID-19
Interventions
Simultaneous Vaccination (Influenza Vaccine and mRNA COVID booster), Sequential Vaccination (Influenza vaccine then mRNA COVID booster), Sequential Vaccination (mRNA COVID booster then Influenza vaccine)
Biological
Lead sponsor
Duke University
Other
Eligibility
6 Years to 64 Years
Enrollment
455 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
8
States / cities
Phoenix, Arizona • Tempe, Arizona • Atlanta, Georgia + 4 more
Source: ClinicalTrials.gov public record
Updated Jun 12, 2025 · Synced Sep 17, 2026, 5:15 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

An Observational Study of Moderna COVID-19 Bivalent Vaccines (Original and Omicron BA.4/BA.5) and 2023 Updated mRNA COVID-19 Vaccines (XBB.1.5)

NCT05765578
View directory record Official record
Conditions
COVID-19
Interventions
Moderna COVID-19 Vaccine, Moderna mRNA1273.222 Booster, Pfizer COVID-19 Vaccine, Moderna 2023 Updated COVID-19 vaccine (XBB.1.5), Pfizer 2023 Updated COVID-19 vaccine (XBB.1.5)
Biological
Lead sponsor
ModernaTX, Inc.
Industry
Eligibility
18 Years and older
Enrollment
1,713 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Culver City, California
Source: ClinicalTrials.gov public record
Updated Jul 30, 2024 · Synced Sep 17, 2026, 5:15 AM EDT
Completed Not applicable Interventional Results available

COVID-19 Vaccine Text Outreach

NCT04834726
View directory record Official record
Conditions
Covid19
Interventions
Opt-In (Call-Back), Opt-in (In-Bound), Standard Message, Clinician Endorsement, Scarcity, Opt-Out Framing, Phone Call
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
16 Years and older
Enrollment
19,554 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 26, 2023 · Synced Sep 17, 2026, 5:15 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Information Provision and Consistency Framing to Increase COVID-19 Booster Uptake

NCT05586178
View directory record Official record
Conditions
COVID-19, Vaccines
Interventions
Reminder that facilitates action, Consistency framing, Information provision about the uniqueness of the bivalent booster, Information provision about bivalent booster eligibility, Information provision about the severity of COVID-19 symptoms
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years and older
Enrollment
177,720 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Dec 4, 2024 · Synced Sep 17, 2026, 5:15 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

A Safety, Reactogenicity, and Immunogenicity Study of mRNA-1073 (COVID-19/Influenza) Vaccine in Adults 18 to 75 Years Old

NCT05375838
View directory record Official record
Conditions
SARS-CoV-2, Influenza
Interventions
mRNA-1073, mRNA-1010, mRNA-1273, Placebo
Biological
Lead sponsor
ModernaTX, Inc.
Industry
Eligibility
18 Years to 75 Years
Enrollment
550 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
14
States / cities
Hollywood, Florida • Peoria, Illinois • Sioux City, Iowa + 9 more
Source: ClinicalTrials.gov public record
Updated Feb 27, 2024 · Synced Sep 17, 2026, 5:15 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Study of a Quadrivalent High-Dose Influenza Vaccine and a Moderna COVID-19 Vaccine Administered Either Concomitantly or Singly in Participants 65 Years of Age and Older Previously Vaccinated With a 2-dose Schedule of Moderna COVID-19 Vaccine

NCT04969276
View directory record Official record
Conditions
Influenza Immunization, Healthy Volunteers
Interventions
Quadrivalent Inactivated Influenza High Dose, COVID-19 mRNA Vaccine (nucleoside modified)
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
65 Years and older
Enrollment
306 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
6
States / cities
Glendale, Arizona • San Diego, California • Vista, California + 3 more
Source: ClinicalTrials.gov public record
Updated Sep 11, 2025 · Synced Sep 17, 2026, 5:15 AM EDT
Completed No phase listed Observational

Acceptability of a COVID-19 Vaccine Among US Adults Over Two Time Periods

NCT04703790
View directory record Official record
Conditions
Covid19, Vaccine Acceptability
Interventions
Not listed
Lead sponsor
Columbia University
Other
Eligibility
18 Years and older
Enrollment
1,208 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 22, 2023 · Synced Sep 17, 2026, 5:15 AM EDT
Not listed Phase 1 Interventional Accepts healthy volunteers

GLS-5310 Vaccine in Healthy Volunteers as a Booster for SARS-CoV-2 (COVID-19)

NCT05182567
View directory record Official record
Conditions
COVID-19, Healthy
Interventions
GLS-5310 (Group 1), GLS-5310 (Group 2), GLS-5310 (Group 3), GLS-5310 (Group 4)
Drug
Lead sponsor
GeneOne Life Science, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
69 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
2
States / cities
Rockville, Maryland • Lincoln, Nebraska
Source: ClinicalTrials.gov public record
Updated Sep 12, 2023 · Synced Sep 17, 2026, 5:15 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Multicomponent Clinic-based Intervention to Promote COVID-19 Vaccine Intention and Uptake Among Diverse Youth and Adolescents

NCT05722652
View directory record Official record
Conditions
COVID-19 Vaccination
Interventions
CONFIDENCE
Behavioral
Lead sponsor
University of Massachusetts, Worcester
Other
Eligibility
18 Years and older
Enrollment
667 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 13, 2025 · Synced Sep 17, 2026, 5:15 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Training the Innate Immune System Against SARS-CoV-2 (COVID-19) Using the Shingrix Vaccine in Nursing Home Residents

NCT04523246
View directory record Official record
Conditions
Herpes Zoster, Allergy and Immunology, Corona Virus Infection
Interventions
SHINGRIX (Zoster Vaccine REcombinant, Adjuvanted), Normal Saline
Biological · Drug
Lead sponsor
University of Oklahoma
Other
Eligibility
65 Years to 100 Years
Enrollment
217 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2023
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Nov 21, 2023 · Synced Sep 17, 2026, 5:15 AM EDT
Not listed No phase listed Observational

National Vaccine Adverse Event Reporting Survey and Etiology

NCT05095844
View directory record Official record
Conditions
COVID-19, Vaccine Adverse Reaction, Vaccine Reaction, Vaccine or Biological Substance, Unspecified Causing Adverse Effects in Therapeutic Use, Corona Virus Infection, Blood Clot, Thrombocytopenia, Neuritis, Vasculitis, Influenza, Guillain-Barré, GWAS, Genetic Sequencing
Interventions
vaccinated
Biological
Lead sponsor
Neuroganics LLC
Industry
Eligibility
5 Years to 99 Years
Enrollment
100,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Northglenn, Colorado
Source: ClinicalTrials.gov public record
Updated Mar 17, 2022 · Synced Sep 17, 2026, 5:15 AM EDT
Enrolling by invitation Not applicable Interventional

Patient-Centered Practical Vaccine Talk For Busy Clinicians

NCT07651761
View directory record Official record
Conditions
Influenza, COVID-19
Interventions
Provider communication training
Other
Lead sponsor
University of Massachusetts, Worcester
Other
Eligibility
18 Years and older
Enrollment
24,500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 28, 2026 · Synced Sep 17, 2026, 5:15 AM EDT
Not listed Phase 4 Interventional Accepts healthy volunteers

Polio Vaccine (IPV) for SARS-CoV-2 and Prevention of Coronavirus Disease (COVID-19)

NCT04639375
View directory record Official record
Conditions
SARS-CoV-2
Interventions
Vaccinated with polio vaccine (IPV)
Biological
Lead sponsor
E-MO Biology Inc
Industry
Eligibility
18 Years to 80 Years
Enrollment
300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
National City, California
Source: ClinicalTrials.gov public record
Updated Aug 26, 2021 · Synced Sep 17, 2026, 5:15 AM EDT
Completed No phase listed Observational

Covid-19 Vaccine Responsiveness in MM and Waldenstrom

NCT04830046
View directory record Official record
Conditions
Multiple Myeloma, Waldenstrom Macroglobulinemia, Immune System Disorder, Covid19
Interventions
Not listed
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
146 participants
Timeline
2021 – 2022
U.S. locations
2
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 25, 2025 · Synced Sep 17, 2026, 5:15 AM EDT