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ClinicalTrials.gov public records Last synced Oct 15, 2026, 6:29 AM EDT

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Showing 313–336 of 404 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: COVID-19 vaccine Clear all
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 15, 2026, 6:29 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

A Study to Evaluate Safety and Immunogenicity of mRNA-1273 Vaccine to Prevent COVID-19 in Adult Organ Transplant Recipients and in Healthy Adult Participants

NCT04860297
View directory record Official record
Conditions
SARS-CoV-2
Interventions
mRNA-1273
Biological
Lead sponsor
ModernaTX, Inc.
Industry
Eligibility
18 Years and older
Enrollment
234 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
15
States / cities
Mesa, Arizona • San Diego, California • New Haven, Connecticut + 12 more
Source: ClinicalTrials.gov public record
Updated Jun 18, 2024 · Synced Oct 15, 2026, 6:29 AM EDT
Completed No phase listed Observational

COVID-19 Immunogenicity of a Third Dose of mRNA-1273 Vaccine Among Cancer Patients

NCT05054218
View directory record Official record
Conditions
Covid19, SARS-CoV2 Infection
Interventions
mRNA-1273
Biological
Lead sponsor
H. Lee Moffitt Cancer Center and Research Institute
Other
Eligibility
18 Years and older
Enrollment
336 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Apr 14, 2023 · Synced Oct 15, 2026, 6:29 AM EDT
Not listed Phase 2Phase 3 Interventional Accepts healthy volunteers

Immuno-bridging and Broadening Study of a Whole, Inactivated COVID-19 Vaccine BBV152 in Healthy Adults

NCT05258669
View directory record Official record
Conditions
COVID-19
Interventions
BBV152
Biological
Lead sponsor
Ocugen
Industry
Eligibility
18 Years and older
Enrollment
400 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
10
States / cities
Tempe, Arizona • Miami, Florida • Miami Lakes, Florida + 6 more
Source: ClinicalTrials.gov public record
Updated Mar 27, 2023 · Synced Oct 15, 2026, 6:29 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Antibody Detection of Vaccine-Induced Secretory Effects

NCT04895475
View directory record Official record
Conditions
Covid19, Humoral Acquired Immunodeficiency, Coronavirus, SARS-CoV Infection
Interventions
SARS-CoV-2 vaccine
Behavioral
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
18 Years and older · Female only
Enrollment
61 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 30, 2025 · Synced Oct 15, 2026, 6:29 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Use of a Live Attenuated Vaccine as an Immune-based Preventive Against COVID-19-associated Sepsis

NCT04475081
View directory record Official record
Conditions
Sepsis Syndrome
Interventions
MMR vaccine
Biological
Lead sponsor
Louisiana State University Health Sciences Center in New Orleans
Other
Eligibility
18 Years to 70 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
New Orleans, Louisiana
Source: ClinicalTrials.gov public record
Updated Nov 26, 2024 · Synced Oct 15, 2026, 6:29 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

COVID19 SARS Vaccinations: Systemic Allergic Reactions to SARS-CoV-2 Vaccinations

NCT04761822
View directory record Official record
Conditions
SARS-CoV Infection, COVID-19, Allergic Reaction, Mast Cell Disorder
Interventions
Moderna COVID-19 Vaccine, Pfizer-BioNTech COVID-19 Vaccine, Placebo
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
5 Years and older
Enrollment
746 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
29
States / cities
Tucson, Arizona • Little Rock, Arkansas • Los Angeles, California + 24 more
Source: ClinicalTrials.gov public record
Updated Aug 12, 2025 · Synced Oct 15, 2026, 6:29 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Community-engaged Optimization of COVID-19 Rapid Evaluation And TEsting Experiences

NCT05894655
View directory record Official record
Conditions
COVID-19, COVID-19 Pandemic
Interventions
COVID-19 walk-up, on-site testing strategy, Community Health Worker (CHW) leading testing navigation and general preventive care reminders, No-cost self-testing kit vending machines
Behavioral
Lead sponsor
University of California, San Diego
Other
Eligibility
Not listed
Enrollment
6,527 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
San Ysidro, California
Source: ClinicalTrials.gov public record
Updated Nov 4, 2025 · Synced Oct 15, 2026, 6:29 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Study to Evaluate the Safety, Tolerability, and Immunogenicity of an RNA Vaccine Candidate Against COVID-19 in Healthy Children

NCT04816643
View directory record Official record
Conditions
SARS-CoV-2 Infection, COVID-19
Interventions
Biological/Vaccine: BNT162b2 10mcg, BNT162b2 20mcg, BNT162b2 30mcg, Placebo, Biological/Vaccine: BNT162b2 3mcg
Biological · Other
Lead sponsor
BioNTech SE
Industry
Eligibility
6 Months to 15 Years
Enrollment
11,837 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
90
States / cities
Birmingham, Alabama • Phoenix, Arizona • Los Angeles, California + 67 more
Source: ClinicalTrials.gov public record
Updated May 28, 2026 · Synced Oct 15, 2026, 6:29 AM EDT
Completed Phase 2 Interventional Results available

COVID-19 Protection After Transplant Pilot Study

NCT04969263
View directory record Official record
Conditions
Kidney Transplant Recipients
Interventions
BNT162b2 vaccine (Pfizer/BioNTech), mRNA-1273 vaccine (Moderna)
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years and older
Enrollment
81 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 30, 2025 · Synced Oct 15, 2026, 6:29 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Promoting Engagement and COVID-19 Testing for Health

NCT06141850
View directory record Official record
Conditions
COVID-19
Interventions
COVID-19 Test Reporting, Personalized Nudges via Text Messaging, Non-personalized Nudges via Text Messaging
Behavioral
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
290 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Feb 23, 2026 · Synced Oct 15, 2026, 6:29 AM EDT
Active, not recruiting Phase 4 Interventional

A Study to Learn About The COVID-19 (Study) Vaccine (Called COMIRNATY) in People That Are Less Than 21 Years Old.

NCT05295290
View directory record Official record
Conditions
Myocarditis
Interventions
Cardiac Imaging
Diagnostic Test
Lead sponsor
Pfizer
Industry
Eligibility
0 Years to 20 Years
Enrollment
319 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2029
U.S. locations
18
States / cities
Los Angeles, California • Madera, California • Hartford, Connecticut + 14 more
Source: ClinicalTrials.gov public record
Updated May 7, 2026 · Synced Oct 15, 2026, 6:29 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

A Study on the Immune Response and Safety of the Shingles Vaccine and the Influenza Vaccine When Either is Given to Healthy Adults at the Same Time or Following a COVID-19 Booster Vaccine

NCT05047770
View directory record Official record
Conditions
Herpes Zoster
Interventions
HZ/su, Flu D-QIV, mRNA-1273
Biological · Combination Product
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years and older
Enrollment
2,013 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
46
States / cities
Tempe, Arizona • Oxnard, California • San Diego, California + 40 more
Source: ClinicalTrials.gov public record
Updated Nov 13, 2023 · Synced Oct 15, 2026, 6:29 AM EDT
Terminated Phase 2 Interventional Results available

Bevacizumab, Autologous Tumor/DC Vaccine, IL-2 and IFNα-2b in Metastatic Renal Cell Carcinoma (RCC) Patients

NCT00913913
View directory record Official record
Conditions
Metastatic Renal Cell Carcinoma
Interventions
DC vaccine, Bevacizumab, IL-2, IFN
Biological · Drug
Lead sponsor
Dartmouth-Hitchcock Medical Center
Other
Eligibility
18 Years and older
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
1
States / cities
Lebanon, New Hampshire
Source: ClinicalTrials.gov public record
Updated Dec 1, 2015 · Synced Oct 15, 2026, 6:29 AM EDT
Completed No phase listed Observational

Immunogenicity of COVID-19 Vaccine in Patients With Inflammatory Bowel Disease

NCT04818892
View directory record Official record
Conditions
IBD, Covid19 Vaccine
Interventions
Serological Assay for SARS-CoV-2
Diagnostic Test
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years to 85 Years
Enrollment
222 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Dec 7, 2022 · Synced Oct 15, 2026, 6:29 AM EDT
Terminated Phase 2 Interventional Accepts healthy volunteers Results available

A Trial Evaluating the Safety and Effects of an RNA Vaccine ARCT-021 in Healthy Adults

NCT04668339
View directory record Official record
Conditions
Covid19, SARS-CoV Infection, Corona Virus Infection
Interventions
ARCT-021 single dose priming, ARCT-021 two lower dose priming, ARCT-021 two higher dose priming, Placebo (two doses), priming, Randomized booster, Placebo booster
Biological
Lead sponsor
Arcturus Therapeutics, Inc.
Industry
Eligibility
18 Years and older
Enrollment
581 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
12
States / cities
Chandler, Arizona • Tucson, Arizona • San Diego, California + 9 more
Source: ClinicalTrials.gov public record
Updated May 15, 2025 · Synced Oct 15, 2026, 6:29 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Increasing Vaccine Uptake in Underresourced Public Housing Areas

NCT04779138
View directory record Official record
Conditions
Coronavirus, Vaccine Refusal
Interventions
Increasing Willingness and Uptake of COVID-19 Vaccination
Behavioral
Lead sponsor
Charles Drew University of Medicine and Science
Other
Eligibility
18 Years and older
Enrollment
462 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2024
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 24, 2024 · Synced Oct 15, 2026, 6:29 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Safety of Pediatric COVID-19 Vaccination

NCT05157191
View directory record Official record
Conditions
Pain, Injection Site Reaction, Adverse Drug Event
Interventions
Observational
Other
Lead sponsor
Duke University
Other
Eligibility
5 Years to 15 Years
Enrollment
299 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
5
States / cities
Oakland, California • Atlanta, Georgia • New York, New York + 2 more
Source: ClinicalTrials.gov public record
Updated Jul 1, 2026 · Synced Oct 15, 2026, 6:29 AM EDT
Active, not recruiting Phase 4 Interventional

Impact of Immunosuppression Adjustment on COVID-19 Vaccination Response in Kidney Transplant Recipients

NCT05060991
View directory record Official record
Conditions
COVID-19, Immunosuppression, Vaccine Response Impaired
Interventions
Reduction in antimetabolite immunosuppression
Drug
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years and older
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Apr 3, 2026 · Synced Oct 15, 2026, 6:29 AM EDT
Completed Early Phase 1 Interventional

Immune Response to the COVID-19 Vaccine

NCT04936997
View directory record Official record
Conditions
Covid19, Cancer, Malignancy, Vaccine Response Impaired
Interventions
SARS-COV2 Pfizer Vaccine
Biological
Lead sponsor
University of Arizona
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated May 20, 2022 · Synced Oct 15, 2026, 6:29 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Getting to Yes, Michigan! (G2YMI)

NCT05096260
View directory record Official record
Conditions
COVID-19 Vaccines, COVID-19 Pandemic
Interventions
Motivational Interviewing based SMS/MMS and web content
Behavioral
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
1,180 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated May 1, 2026 · Synced Oct 15, 2026, 6:29 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

BCG Vaccine for Health Care Workers as Defense Against COVID 19

NCT04348370
View directory record Official record
Conditions
Coronavirus, Coronavirus Infection, Coronavirus as the Cause of Diseases Classified Elsewhere
Interventions
BCG Vaccine, Placebo Vaccine
Biological
Lead sponsor
Texas A&M University
Other
Eligibility
18 Years to 75 Years
Enrollment
659 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2023
U.S. locations
6
States / cities
Los Angeles, California • Bryan, Texas • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Oct 8, 2024 · Synced Oct 15, 2026, 6:29 AM EDT
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 15, 2026, 6:29 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

COVID-19 Vaccine Uptake Trial

NCT05419232
View directory record Official record
Conditions
Vaccination Refusal, COVID-19
Interventions
Short Message Service (SMS) + Website Link Strategy, Phone Call with Peer Strategy
Other
Lead sponsor
Washington University School of Medicine
Other
Eligibility
Not listed
Enrollment
262 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
8
States / cities
Hazelwood, Missouri • Jennings, Missouri • Saint Ann, Missouri + 2 more
Source: ClinicalTrials.gov public record
Updated Jul 21, 2026 · Synced Oct 15, 2026, 6:29 AM EDT