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ClinicalTrials.gov public records Last synced Oct 4, 2026, 4:52 PM EDT

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Showing 73–96 of 372 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: SARS-CoV-2 vaccine Clear all
Completed Not applicable Interventional Accepts healthy volunteers

COVID-19 Vaccine Messaging, Part 1

NCT04460703
View directory record Official record
Conditions
Vaccination, COVID-19
Interventions
Control message, Baseline message, Personal freedom message, Economic freedom message, Self-interest message, Community interest message, Economic benefit message, Guilt message, Embarrassment message, Anger message, Trust in science message, Not bravery message
Other
Lead sponsor
Yale University
Other
Eligibility
18 Years and older
Enrollment
4,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated May 5, 2022 · Synced Oct 4, 2026, 4:52 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

CATCH-UP Vaccines: Engaged Approaches to Testing in Community/Healthcare Settings for the Underserved (COVID-19)

NCT05236270
View directory record Official record
Conditions
COVID-19, Vaccine Refusal
Interventions
Text Message, Motivational Interviewing, Electronic Educational Message with Tailored Questions/Prompts
Behavioral
Lead sponsor
University of Oklahoma
Other
Eligibility
18 Years to 100 Years
Enrollment
312 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated May 22, 2024 · Synced Oct 4, 2026, 4:52 PM EDT
Terminated Not applicable Interventional Results available

PROmotion of COvid-19 VA(X)Ccination in the Emergency Department - PROCOVAXED

NCT05142332
View directory record Official record
Conditions
Covid-19 Vaccine, Vaccine Hesitancy
Interventions
Covid-19 vaccine education materials
Other
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
541 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
7
States / cities
San Francisco, California • Durham, North Carolina • Philadelphia, Pennsylvania + 1 more
Source: ClinicalTrials.gov public record
Updated Dec 13, 2023 · Synced Oct 4, 2026, 4:52 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Phase I Safety Study of B/HPIV3/S-6P Vaccine Via Nasal Spray in Adults

NCT06026514
View directory record Official record
Conditions
SARS-CoV-2 Infection
Interventions
B/HPIV3/S-6P
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 50 Years
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 20, 2026 · Synced Oct 4, 2026, 4:52 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

SARS-CoV-2 Immune Responses After COVID-19 Therapy and Subsequent Vaccine

NCT04952402
View directory record Official record
Conditions
Covid19, SARS-CoV2 Infection
Interventions
Study-provided Moderna mRNA-1273 COVID-19 vaccine, Community-provided Moderna mRNA-1273 COVID-19 Vaccine, Community-Provided Pfizer-BioNTech BNT162b2 COVID-19 Vaccine
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years and older
Enrollment
43 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
6
States / cities
Los Angeles, California • San Diego, California • Chicago, Illinois + 3 more
Source: ClinicalTrials.gov public record
Updated May 24, 2023 · Synced Oct 4, 2026, 4:52 PM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers

A Safety and Immunogenicity Trial of OCU500, ChAd36 Vector Encoding SARS-CoV-2 Spike Vaccine Via Intranasal and Inhalational Routes in Previously Vaccinated Adults

NCT07536308
View directory record Official record
Conditions
COVID-19
Interventions
OCU500
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 64 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
6
States / cities
Decatur, Georgia • Baltimore, Maryland • Boston, Massachusetts + 2 more
Source: ClinicalTrials.gov public record
Updated Oct 2, 2026 · Synced Oct 4, 2026, 4:52 PM 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 13, 2025 · Synced Oct 4, 2026, 4:52 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

To Evaluate the Safety, Tolerability, Efficacy and Immunogenicity of BNT162b2 Boosting Strategies Against COVID-19 in Participants ≥12 Years of Age.

NCT04955626
View directory record Official record
Conditions
SARS-CoV-2 Infection, COVID-19
Interventions
BNT162b2, Placebo, BNT162b2 OMI, Combination BNT162b2 and BNT162b2 OMI, Combination (Bivalent) BNT162b2 and BNT162b2 OMI
Biological · Other
Lead sponsor
BioNTech SE
Industry
Eligibility
12 Years and older
Enrollment
16,372 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
139
States / cities
Athens, Alabama • Birmingham, Alabama • Huntsville, Alabama + 99 more
Source: ClinicalTrials.gov public record
Updated Nov 10, 2025 · Synced Oct 4, 2026, 4:52 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Novelty, Conformity and Trust in COVID-19 Vaccines

NCT04693689
View directory record Official record
Conditions
Trust
Interventions
RNA vaccine, 20% adoption rate, 40% adoption rate, 60% adoption rate, 80% adoption rate, Conventional vaccine, 0% adoption rate
Other
Lead sponsor
National University of Singapore
Other
Eligibility
18 Years and older
Enrollment
35,180 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
San Mateo, California
Source: ClinicalTrials.gov public record
Updated Feb 22, 2022 · Synced Oct 4, 2026, 4:52 PM EDT
Terminated No phase listed Observational

Efficacy of COVID-19 Vaccination in Patients With Multiple Sclerosis Treated With Immune Modulating Medication

NCT04796584
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Analysis of cell-mediated and antibody-mediated immunity to SARS-CoV-2 virus
Other
Lead sponsor
Providence Health & Services
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Apr 3, 2023 · Synced Oct 4, 2026, 4:52 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

A Study of Ad26.COV2.S Administered as Booster Vaccination in Adults Who Have Previously Received Primary Vaccination With Ad26.COV2.S or BNT162b2

NCT04999111
View directory record Official record
Conditions
Coronavirus Disease
Interventions
Ad26.COV2.S
Biological
Lead sponsor
Janssen Vaccines & Prevention B.V.
Industry
Eligibility
18 Years and older
Enrollment
1,541 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
21
States / cities
Phoenix, Arizona • Tucson, Arizona • Anaheim, California + 17 more
Source: ClinicalTrials.gov public record
Updated Feb 4, 2025 · Synced Oct 4, 2026, 4:52 PM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers

Study to Evaluate Safety and Immunogenicity of COVID-19 Vaccine in Children 6 Months to < 12 Years

NCT05468736
View directory record Official record
Conditions
COVID-19
Interventions
SARS-CoV-2 rS/Matrix-M1 Adjuvant (Initial Vaccination Period), Placebo
Biological · Other
Lead sponsor
Novavax
Industry
Eligibility
6 Months to 11 Years
Enrollment
3,600 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
47
States / cities
Little Rock, Arkansas • Anaheim, California • Bellflower, California + 41 more
Source: ClinicalTrials.gov public record
Updated May 22, 2026 · Synced Oct 4, 2026, 4:52 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

A Trial Evaluating the Safety and Immunogenicity of 3 COVID-19 SARS-CoV-2 RNA Vaccines in Healthy Adults

NCT05037097
View directory record Official record
Conditions
COVID-19, SARS-CoV-2 Infection, Corona Virus Infection
Interventions
ARCT-165, ARCT-154, ARCT-021
Biological
Lead sponsor
Arcturus Therapeutics, Inc.
Industry
Eligibility
21 Years to 80 Years
Enrollment
72 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
2
States / cities
Wichita, Kansas • Kansas City, Missouri
Source: ClinicalTrials.gov public record
Updated Oct 15, 2025 · Synced Oct 4, 2026, 4:52 PM EDT
Completed Not applicable Interventional Results available

Does Framing and Humor Improve the Effectiveness of Messages About COVID-19 Vaccine

NCT05085613
View directory record Official record
Conditions
Beliefs
Interventions
Corrective message framing and humor
Behavioral
Lead sponsor
Johns Hopkins Bloomberg School of Public Health
Other
Eligibility
21 Years to 99 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 21, 2023 · Synced Oct 4, 2026, 4:52 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

A Study to Learn About How the Flu and COVID-19 Vaccines Act in Healthy People

NCT06821061
View directory record Official record
Conditions
Influenza, COVID-19 (Coronavirus Disease 2019)
Interventions
Investigational Influenza Vaccine, Investigational COVID-19 Vaccine, Investigational Influenza and COVID-19 Combination Vaccine, Licensed Influenza Vaccine 1, Licensed Influenza Vaccine 2, Licensed Influenza Vaccine 3, Licensed COVID-19 Vaccine
Biological · Combination Product
Lead sponsor
BioNTech SE
Industry
Eligibility
18 Years and older
Enrollment
2,650 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
31
States / cities
Anaheim, California • Lake Forest, California • Riverside, California + 26 more
Source: ClinicalTrials.gov public record
Updated Jan 26, 2026 · Synced Oct 4, 2026, 4:52 PM EDT
Terminated Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Study of mRNA Vaccine Formulation Against COVID-19 in Healthy Adults 18 Years of Age and Older

NCT04798027
View directory record Official record
Conditions
COVID-19
Interventions
SARS-CoV-2 mRNA vaccine formulation 1, SARS-CoV-2 mRNA vaccine formulation 2, SARS-CoV-2 mRNA vaccine formulation 3, Placebo (0.9% normal saline)
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
18 Years and older
Enrollment
182 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
12
States / cities
Rolling Hills Estates, California • Hollywood, Florida • Miami, Florida + 9 more
Source: ClinicalTrials.gov public record
Updated Sep 11, 2025 · Synced Oct 4, 2026, 4:52 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

A Study to Learn About a Combined COVID-19 and Influenza Shot in Healthy Adults

NCT06237049
View directory record Official record
Conditions
Influenza, Human, SARS-CoV-2 Infection, COVID-19
Interventions
BNT162b2 (Omi XBB.1.5)/RIV, BNT162b2 (Omi XBB.1.5), RIV, Normal saline placebo
Biological · Other
Lead sponsor
Pfizer
Industry
Eligibility
50 Years and older
Enrollment
644 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
30
States / cities
Lake Forest, California • Tustin, California • Walnut Creek, California + 22 more
Source: ClinicalTrials.gov public record
Updated Sep 30, 2025 · Synced Oct 4, 2026, 4:52 PM EDT
Recruiting No phase listed Observational

Evaluation of Human Immune Responses Vaccination in Patients With Lymphoma

NCT03501576
View directory record Official record
Conditions
Chronic Lymphocytic Leukemia, Diffuse Large B-Cell Lymphoma, Follicular Lymphoma, Mantle Cell Lymphoma, Mature T-Cell and NK-Cell Non-Hodgkin Lymphoma
Interventions
Inactivated Influenza Vaccine
Biological
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2028
U.S. locations
2
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jul 6, 2026 · Synced Oct 4, 2026, 4:52 PM EDT
Completed No phase listed Observational

Post COVID-19 Vaccination Analysis in Healthcare Worker Recipients

NCT04922944
View directory record Official record
Conditions
Covid19, Vaccine Reaction
Interventions
COVID-19 vaccine
Drug
Lead sponsor
Huntington Memorial Hospital
Other
Eligibility
Not listed
Enrollment
167 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Pasadena, California
Source: ClinicalTrials.gov public record
Updated Sep 19, 2024 · Synced Oct 4, 2026, 4:52 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

COVID-19 Study to Assess Immunogenicity, Safety, and Tolerability of Moderna mRNA-1273 Vaccine Administered With Casirivimab+Imdevimab in Healthy Adult Volunteers

NCT04852978
View directory record Official record
Conditions
Healthy, Chronic Stable Illness
Interventions
casirivimab+imdevimab, Moderna mRNA-1273 vaccine
Drug · Biological
Lead sponsor
Regeneron Pharmaceuticals
Industry
Eligibility
18 Years to 90 Years
Enrollment
295 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
6
States / cities
Little Rock, Arkansas • Rogers, Arkansas • Hialeah, Florida + 3 more
Source: ClinicalTrials.gov public record
Updated Oct 20, 2025 · Synced Oct 4, 2026, 4:52 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

A Study of Ad26.COV2.S for the Prevention of SARS-CoV-2-mediated COVID-19 in Adults

NCT04614948
View directory record Official record
Conditions
Participants With or Without Stable Co-morbidities Associated With Progression to Severe COVID-19
Interventions
Ad26.COV2.S, Placebo
Biological · Other
Lead sponsor
Janssen Vaccines & Prevention B.V.
Industry
Eligibility
18 Years and older
Enrollment
31,835 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2023
U.S. locations
63
States / cities
Vestavia Hills, Alabama • Phoenix, Arizona • Tucson, Arizona + 53 more
Source: ClinicalTrials.gov public record
Updated Feb 4, 2025 · Synced Oct 4, 2026, 4:52 PM EDT
Completed No phase listed Observational

Glycemic Effects of the COVID-19 Booster Vaccine in Type 1 Diabetes

NCT05233592
View directory record Official record
Conditions
Type 1 Diabetes, Diabetes Mellitus, Type 1
Interventions
CGM
Device
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Columbia, Maryland
Source: ClinicalTrials.gov public record
Updated May 17, 2023 · Synced Oct 4, 2026, 4:52 PM EDT
Completed Not applicable Interventional Results available

Improving COVID-19 Vaccine Uptake Among Black and Latino Youth

NCT05293392
View directory record Official record
Conditions
COVID-19
Interventions
Culturally-Tailored COVID-19 Vaccine Uptake Intervention, Standard Care
Behavioral
Lead sponsor
Nemours Children's Health System
Other
Eligibility
Not listed
Enrollment
5,792 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022
U.S. locations
1
States / cities
Wilmington, Delaware
Source: ClinicalTrials.gov public record
Updated Sep 28, 2023 · Synced Oct 4, 2026, 4:52 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Message From Local Pharmacy Team

NCT05613764
View directory record Official record
Conditions
COVID-19
Interventions
COVID Booster text messages
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
520,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 3, 2023 · Synced Oct 4, 2026, 4:52 PM EDT