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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: COVID-19 Infection Clear all
Completed Not applicable Interventional Accepts healthy volunteers Results available

Rural Tailored COVID-19 Communication to Promote SARS-CoV-2 Antibody Testing in Saliva

NCT06085547
View directory record Official record
Conditions
SARS-CoV2 Infection
Interventions
General SARS-CoV-2 Communication, Rural-Targeted SARS-CoV-2 Communication
Behavioral
Lead sponsor
Michigan State University
Other
Eligibility
18 Years and older
Enrollment
264 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Flint, Michigan
Source: ClinicalTrials.gov public record
Updated Jan 16, 2025 · Synced Jul 21, 2026, 5:53 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Scripps-eMed Covid-19 Study: A Prospective Monitoring Study for Those Individuals Treated With Paxlovid

NCT05618600
View directory record Official record
Conditions
COVID-19
Interventions
Not listed
Lead sponsor
Scripps Translational Science Institute
Other
Eligibility
18 Years and older
Enrollment
917 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Apr 23, 2026 · Synced Jul 21, 2026, 5:53 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Electronic Health Record Strategies to Promote Diverse Participation in Research AIM 2

NCT06467487
View directory record Official record
Conditions
Patient Participation
Interventions
Traditional Letter, Direct to Patient Message, Optimized Letter, Direct to Patient Message - Optimized
Other
Lead sponsor
Yale University
Other
Eligibility
18 Years and older
Enrollment
214,526 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jan 12, 2025 · Synced Jul 21, 2026, 5:53 PM EDT
Terminated Phase 2 Interventional Results available

Safety and Efficacy of AT-527 in Subjects With Moderate Coronavirus Disease (COVID-19) in a Hospital Setting

NCT04396106
View directory record Official record
Conditions
COVID-19
Interventions
AT-527, Placebo
Drug · Other
Lead sponsor
Atea Pharmaceuticals, Inc.
Industry
Eligibility
18 Years and older
Enrollment
83 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
15
States / cities
Scottsdale, Arizona • Davis, California • Los Angeles, California + 11 more
Source: ClinicalTrials.gov public record
Updated Mar 8, 2023 · Synced Jul 21, 2026, 5:53 PM EDT
Completed Phase 2 Interventional Results available

Smell in Covid-19 and Efficacy of Nasal Theophylline

NCT04789499
View directory record Official record
Conditions
Covid19, Anosmia, Olfactory Disorder, Covid-19 Pandemic, SARS-CoV-2 Infection, Hyposmia, Ageusia, Hypogeusia
Interventions
Theophylline Powder, Placebo Comparator
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 70 Years
Enrollment
51 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated May 23, 2023 · Synced Jul 21, 2026, 5:53 PM EDT
Completed Not applicable Interventional

RECOVER-ENERGIZE Platform Protocol

NCT06404047
View directory record Official record
Conditions
Long COVID, Long Covid19, Long Covid-19
Interventions
Personalized Cardiopulmonary Rehabilitation, Structured Pacing, Education, Usual Care
Behavioral · Other
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
660 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
42
States / cities
Birmingham, Alabama • Phoenix, Arizona • Tucson, Arizona + 33 more
Source: ClinicalTrials.gov public record
Updated Nov 13, 2025 · Synced Jul 21, 2026, 5:53 PM EDT
Active, not recruiting No phase listed Observational

COVID-19 Outcome Prediction Algorithm

NCT05471011
View directory record Official record
Conditions
COVID-19, Post Acute Sequelae of COVID-19, Long COVID, Organ Dysfunction Syndrome, Multiple, Frailty Syndrome
Interventions
Blood and nasal swab sampling
Other
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years and older
Enrollment
600 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
7
States / cities
Los Angeles, California • Sylmar, California • Torrance, California + 3 more
Source: ClinicalTrials.gov public record
Updated Apr 23, 2026 · Synced Jul 21, 2026, 5:53 PM EDT
Completed No phase listed Observational

COVID-19 Antibody Levels After Vaccines

NCT04944134
View directory record Official record
Conditions
Vaccine Preventable Disease
Interventions
COVID-19 Vaccination
Biological
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years and older
Enrollment
71 participants
Timeline
2021 – 2022
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 31, 2022 · Synced Jul 21, 2026, 5:53 PM EDT
Completed Not applicable Interventional Results available

Early PP With HFNC Versus HFNC in COVID-19 Induced Moderate to Severe ARDS

NCT04325906
View directory record Official record
Conditions
Prone Positioning, High Flow Nasal Cannula, Acute Respiratory Distress Syndrome, Corona Virus Infection
Interventions
high flow nasal cannula (HFNC), Prone positioning (PP)
Device · Procedure
Lead sponsor
Rush University Medical Center
Other
Eligibility
18 Years and older
Enrollment
224 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Mar 1, 2022 · Synced Jul 21, 2026, 5:53 PM EDT
Completed Not applicable Interventional

UNITE Study (UMN-SW) for COVID-19

NCT04854798
View directory record Official record
Conditions
Covid19, Cytokine Storm, Inflammation
Interventions
Splenic Ultrasound
Device
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years and older
Enrollment
58 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
2
States / cities
Burnsville, Minnesota • Saint Paul, Minnesota
Source: ClinicalTrials.gov public record
Updated May 2, 2024 · Synced Jul 21, 2026, 5:53 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Examine the Psychosocial Impacts of COVID-19 Pandemic.

NCT05052333
View directory record Official record
Conditions
Psychosocial Impacts, COVID-19 Pandemic
Interventions
Not listed
Lead sponsor
University of Otago
Other
Eligibility
18 Years and older
Enrollment
2,574 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Dec 5, 2023 · Synced Jul 21, 2026, 5:53 PM EDT
Completed Not applicable Interventional

Vagal Approaches on Long COVID-19

NCT07190105
View directory record Official record
Conditions
Long COVID Symptoms
Interventions
Sonocea Sonic Augmentation Technology (SAT), Truvaga Electrical Vagus Nerve Stimulator
Other
Lead sponsor
Leidos Life Sciences
Industry
Eligibility
18 Years and older
Enrollment
546 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025
U.S. locations
1
States / cities
Frederick, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 6, 2026 · Synced Jul 21, 2026, 5:53 PM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Impact of the COVID-19 Pandemic and HRQOL in Cancer Patients and Survivors

NCT04447222
View directory record Official record
Conditions
COVID-19 Infection, Malignant Solid Neoplasm
Interventions
Quality-of-Life Assessment, Questionnaire Administration, Survey Administration
Other
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
Not listed
Enrollment
1,242 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2026
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Feb 18, 2026 · Synced Jul 21, 2026, 5:53 PM EDT
Terminated Phase 2 Interventional Results available

Booster Dose Trial

NCT05016622
View directory record Official record
Conditions
Cancer
Interventions
BNT162b2 vaccine
Biological
Lead sponsor
Montefiore Medical Center
Other
Eligibility
18 Years and older
Enrollment
106 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Jul 30, 2024 · Synced Jul 21, 2026, 5:53 PM EDT
Recruiting No phase listed Observational

Natural History of Systemic and Nasal Mucosal Immunity to Influenza and SARS-CoV-2 in Adults After Vaccination

NCT04794829
View directory record Official record
Conditions
Influenza, COVID-19
Interventions
Not listed
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 120 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 7, 2026 · Synced Jul 21, 2026, 5:53 PM EDT
Terminated Phase 3 Interventional Results available

Janssen Ad26.CoV2.S Vaccine Booster in Kidney Transplant Recipients

NCT05220397
View directory record Official record
Conditions
Kidney Transplant Recipient
Interventions
Janssen Ad26.CoV2.S Vaccine, Reduction in Immunosuppression Medication, Maintenance in Immunosuppression Medication
Biological · Other
Lead sponsor
Mark Stegall
Other
Eligibility
18 Years and older
Enrollment
468 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
3
States / cities
Phoenix, Arizona • Jacksonville, Florida • Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 14, 2025 · Synced Jul 21, 2026, 5:53 PM EDT
Completed No phase listed Observational

Evaluation of Antibody Tests for COVID-19

NCT04360954
View directory record Official record
Conditions
COVID, Coronavirus
Interventions
Diagnostic test
Diagnostic Test
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
461 participants
Timeline
2020
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jun 3, 2024 · Synced Jul 21, 2026, 5:53 PM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Shifts in the Respiratory Microbiome and Clinical Outcomes of SARS-CoV-2

NCT04815018
View directory record Official record
Conditions
SARS-CoV-2 Infection, Bacterial Respiratory Tract Infection, Viral Respiratory Tract Infection
Interventions
Not listed
Lead sponsor
Pathnostics
Industry
Eligibility
60 Years and older
Enrollment
185 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
4
States / cities
Delaware, Ohio • Granville, Ohio • Westerville, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 29, 2021 · Synced Jul 21, 2026, 5:53 PM EDT
Completed Phase 2 Interventional Results available

FEnofibRate as a Metabolic INtervention for COVID-19

NCT04517396
View directory record Official record
Conditions
Covid19
Interventions
Fenofibrate/fenofibric acid, Placebo, Usual care
Other
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
701 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 23, 2023 · Synced Jul 21, 2026, 5:53 PM EDT
Recruiting Not applicable Interventional

Expressive Writing for the Management of Stress in Cancer Survivors

NCT04776941
View directory record Official record
Conditions
Hematopoietic and Lymphoid Cell Neoplasm, Malignant Solid Neoplasm
Interventions
Behavioral Intervention, Quality-of-Life Assessment, Questionnaire Administration
Behavioral · Other
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
414 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2028
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 1, 2026 · Synced Jul 21, 2026, 5:53 PM EDT
Active, not recruiting Phase 2 Interventional

Low-Dose Radiotherapy For Patients With SARS-COV-2 (COVID-19) Pneumonia

NCT04466683
View directory record Official record
Conditions
Covid-19, Sars-CoV2, Pneumonia
Interventions
Low dose radiation 35 cGy, High dose radiation 100 cGy
Radiation
Lead sponsor
Ohio State University
Other
Eligibility
50 Years and older
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
6
States / cities
Boca Raton, Florida • Miami, Florida • Maywood, Illinois + 3 more
Source: ClinicalTrials.gov public record
Updated Apr 15, 2026 · Synced Jul 21, 2026, 5:53 PM EDT
Completed Phase 2Phase 3 Interventional Results available

Safety and Efficacy of NP-120 (Ifenprodil) for the Treatment of Hospitalized Patient With Confirmed COVID-19 Disease

NCT04382924
View directory record Official record
Conditions
COVID
Interventions
NP-120 (Ifenprodil)
Drug
Lead sponsor
Algernon Pharmaceuticals
Industry
Eligibility
18 Years and older
Enrollment
168 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
4
States / cities
Miami, Florida • Chicago, Illinois • Saint Joseph, Missouri + 1 more
Source: ClinicalTrials.gov public record
Updated Dec 2, 2021 · Synced Jul 21, 2026, 5:53 PM EDT
Terminated Phase 2 Interventional Results available

Tocilizumab for Prevention of Respiratory Failure in Patients With Severe COVID-19 Infection

NCT04377659
View directory record Official record
Conditions
COVID-19
Interventions
Tocilizumab
Drug
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated May 27, 2025 · Synced Jul 21, 2026, 5:53 PM EDT
Completed Phase 1 Interventional

Allogeneic Natural Killer (NK) Cell Therapy in Subjects Hospitalized for COVID-19

NCT04900454
View directory record Official record
Conditions
COVID-19 Pneumonia
Interventions
DVX201
Biological
Lead sponsor
Coeptis Therapeutics
Industry
Eligibility
18 Years to 80 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Apr 7, 2024 · Synced Jul 21, 2026, 5:53 PM EDT