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ClinicalTrials.gov public records Last synced Oct 9, 2026, 2:02 AM EDT

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Showing 73–96 of 110 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: COVID-19+ observational Clear all
Completed No phase listed Observational

Yale COVID-19 Recovery Study

NCT04895189
View directory record Official record
Conditions
Covid19 Sequelae
Interventions
No intervention
Other
Lead sponsor
Yale University
Other
Eligibility
18 Years and older
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2025
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated May 29, 2025 · Synced Oct 9, 2026, 2:02 AM EDT
Completed No phase listed Observational

Prognostic Value of Point of Care Cardiac and Lung Ultrasound in COVID-19

NCT04379544
View directory record Official record
Conditions
Coronavirus, Respiratory Failure
Interventions
Observation only
Other
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years to 100 Years
Enrollment
125 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 21, 2023 · Synced Oct 9, 2026, 2:02 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Non-invasive Biometric Monitoring in Nursing Homes to Fight COVID-19

NCT04548895
View directory record Official record
Conditions
Covid19, Community-Acquired Respiratory Tract Infection
Interventions
Observational measurement of biometric data. No change to health care provided.
Device
Lead sponsor
Health Stream Analytics, LLC
Industry
Eligibility
Not listed
Enrollment
26 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Pasco, Washington
Source: ClinicalTrials.gov public record
Updated Jun 11, 2021 · Synced Oct 9, 2026, 2:02 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

COVID-19 Related Health and Infection Control Practices Among Dentists

NCT04423770
View directory record Official record
Conditions
Severe Acute Respiratory Syndrome Coronavirus 2
Interventions
No intervention
Other
Lead sponsor
American Dental Association
Other
Eligibility
18 Years and older
Enrollment
2,196 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 22, 2021 · Synced Oct 9, 2026, 2:02 AM EDT
Not listed No phase listed Observational

Beat COVID-19 - Observational Trial

NCT04337762
View directory record Official record
Conditions
COVID-19
Interventions
Not listed
Lead sponsor
Beat COVID LLC
Industry
Eligibility
18 Years to 110 Years
Enrollment
100,000 participants
Timeline
2020 – 2021
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 9, 2020 · Synced Oct 9, 2026, 2:02 AM EDT
Completed No phase listed Observational

COVID-19 Associated Pulmonary Aspergillosis (CAPA) and Other Invasive Fungal Infections (IFI)

NCT04818853
View directory record Official record
Conditions
Covid19, Aspergillosis, Fungal Infection
Interventions
Observation to monitor patients for these infections
Other
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years and older
Enrollment
219 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Jan 16, 2026 · Synced Oct 9, 2026, 2:02 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

The Impact of COVID-19 on Pulmonary Procedures

NCT05022446
View directory record Official record
Conditions
COVID-19 Infection, Hematopoietic and Lymphoid Cell Neoplasm, Malignant Solid Neoplasm
Interventions
Survey Administration
Other
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
Not listed
Enrollment
250 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2027
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Aug 10, 2026 · Synced Oct 9, 2026, 2:02 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Feasibility of Rapid COVID-19 Testing in Disadvantaged Populations

NCT04558307
View directory record Official record
Conditions
Coronavirus Disease (COVID-19)
Interventions
Pilot a rapid SARS-CoV-2 testing strategy, Community-driven messages to promote COVID-19 testing
Diagnostic Test · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
Not listed
Enrollment
1,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jul 13, 2021 · Synced Oct 9, 2026, 2:02 AM EDT
Not listed No phase listed Observational

Blood Purification With Seraph 100 Microbind Affinity Blood Filter for Treatment of Severe COVID19 Observational Study

NCT04606498
View directory record Official record
Conditions
Covid19
Interventions
Observational
Other
Lead sponsor
Henry M. Jackson Foundation for the Advancement of Military Medicine
Other
Eligibility
18 Years and older
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
14
States / cities
Los Angeles, California • Aurora, Colorado • Orlando, Florida + 7 more
Source: ClinicalTrials.gov public record
Updated Nov 1, 2022 · Synced Oct 9, 2026, 2:02 AM EDT
Completed No phase listed Observational

Risks of Bacterial and Fungal Superinfection in Patients With COVID-19

NCT05256316
View directory record Official record
Conditions
COVID-19
Interventions
Previously admitted COVID-19 patients in intensive care units
Other
Lead sponsor
The University of Queensland
Other
Eligibility
18 Years and older
Enrollment
790 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated May 22, 2023 · Synced Oct 9, 2026, 2:02 AM EDT
Completed No phase listed Observational

An Observational Study of Neurologic Function After COVID-19 Infection

NCT04564287
View directory record Official record
Conditions
COVID-19
Interventions
Not listed
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
18 Years and older
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 1, 2025 · Synced Oct 9, 2026, 2:02 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

COVID-19 Recovery Study: Symptoms and Biomarkers of Long COVID-19 in People Living With and Without HIV

NCT04958889
View directory record Official record
Conditions
Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV2), HIV
Interventions
No intervention
Other
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Enrollment
392 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2024
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 4, 2024 · Synced Oct 9, 2026, 2:02 AM EDT
Active, not recruiting No phase listed Observational

A Clinical Observational Study of SARS-CoV-2 Specific CD8 T-Cell Responses to COVID-19 Vaccines in Humans

NCT04852289
View directory record Official record
Conditions
COVID-19
Interventions
Not listed
Lead sponsor
National Institute on Aging (NIA)
NIH
Eligibility
18 Years to 99 Years
Enrollment
78 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
2
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 9, 2026 · Synced Oct 9, 2026, 2:02 AM EDT
Recruiting No phase listed Observational

Long-Term Study of COVID-19 Infection and Long COVID

NCT07781501
View directory record Official record
Conditions
SARS CoV-2 Post-Acute Sequelae
Interventions
This study is observational. Only patients who have previously tested positive for SARS-CoV-2 infection or are experiencing ongoing symptoms.
Other
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 75 Years
Enrollment
500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2029
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 28, 2026 · Synced Oct 9, 2026, 2:02 AM EDT
Completed No phase listed Observational

suPAR Michigan M2C2 Heterogeneity Validation Cohort Study

NCT07466524
View directory record Official record
Conditions
COVID-19, Severe Respiratory Distress Syndrome, Acute Respiratory Distress Syndrome
Interventions
suPARnostic® TurbiLatex Assay on Roche cobas c501
Diagnostic Test
Lead sponsor
ViroGates A/S
Industry
Eligibility
18 Years and older
Enrollment
367 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Mar 20, 2026 · Synced Oct 9, 2026, 2:02 AM EDT
Active, not recruiting No phase listed Observational

Evaluation of Immunologic Response Following COVID-19 Vaccination in Children, Adolescents, and Young Adults With Cancer

NCT05228275
View directory record Official record
Conditions
COVID-19 Infection, Hematopoietic and Lymphatic System Neoplasm, Malignant Solid Neoplasm
Interventions
Biospecimen Collection, Survey Administration
Procedure · Other
Lead sponsor
Children's Oncology Group
Network
Eligibility
6 Months to 37 Years
Enrollment
549 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2028
U.S. locations
72
States / cities
Birmingham, Alabama • Kingman, Arizona • Oakland, California + 50 more
Source: ClinicalTrials.gov public record
Updated Jul 16, 2026 · Synced Oct 9, 2026, 2:02 AM EDT
Completed No phase listed Observational

Distress Associated with Coronavirus Disease 2019 and Telehealth on Supportive Care Patients with Advanced Cancer

NCT05058339
View directory record Official record
Conditions
Advanced Malignant Solid Neoplasm, COVID-19 Infection, Hematopoietic and Lymphoid Cell Neoplasm, Locally Advanced Malignant Solid Neoplasm, Metastatic Malignant Solid Neoplasm, Recurrent Hematologic Malignancy, Recurrent Malignant Solid Neoplasm
Interventions
Survey Administration
Other
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
223 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Sep 19, 2024 · Synced Oct 9, 2026, 2:02 AM EDT
Terminated No phase listed Observational

Ocular Findings and Viral Persistence in Ocular Fluids in COVID-19 Survivors

NCT04665752
View directory record Official record
Conditions
COVID-19
Interventions
Not listed
Lead sponsor
National Eye Institute (NEI)
NIH
Eligibility
18 Years and older
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 6, 2022 · Synced Oct 9, 2026, 2:02 AM EDT
Completed No phase listed Observational

A Multicenter Study to Assess Response to COVID-19 Vaccine in Multiple Sclerosis Participants Treated With Ofatumumab

NCT04847596
View directory record Official record
Conditions
Relapsing Multiple Sclerosis
Interventions
Ofatumumab, Covid-19 vaccine
Other
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years to 55 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
4
States / cities
Phoenix, Arizona • Owosso, Michigan • St Louis, Missouri + 1 more
Source: ClinicalTrials.gov public record
Updated Jan 25, 2023 · Synced Oct 9, 2026, 2:02 AM EDT
Completed No phase listed Observational

Immunophenotyping Assessment in a COVID-19 Cohort

NCT04378777
View directory record Official record
Conditions
Coronavirus Disease 2019 (COVID-19), SARS-CoV-2
Interventions
Biological sample collection, Data Collection: Clinical Care Assessments
Procedure
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years and older
Enrollment
1,227 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
17
States / cities
Tucson, Arizona • Los Angeles, California • San Francisco, California + 14 more
Source: ClinicalTrials.gov public record
Updated May 19, 2022 · Synced Oct 9, 2026, 2:02 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Scaling Mental Healthcare in COVID-19 With Voice Biomarkers

NCT04510519
View directory record Official record
Conditions
Major Depressive Disorder, Generalized Anxiety
Interventions
Not listed
Lead sponsor
Kintsugi Mindful Wellness, Inc.
Industry
Eligibility
18 Years to 100 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Berkeley, California
Source: ClinicalTrials.gov public record
Updated Sep 30, 2022 · Synced Oct 9, 2026, 2:02 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

COVID-19 Vaccine Responses in PIDD Subjects

NCT05321407
View directory record Official record
Conditions
X-linked Agammaglobulinemia, XLA, Primary Immune Deficiency, CVID, Common Variable Immunodeficiency, Primary Antibody Deficiencies, Secondary Hypogammaglobulinemia
Interventions
Not listed
Lead sponsor
Duke University
Other
Eligibility
6 Months and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
3
States / cities
St. Petersburg, Florida • Chapel Hill, North Carolina • Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 3, 2025 · Synced Oct 9, 2026, 2:02 AM EDT
Completed No phase listed Observational

COVID-19 PRIORITY (Pregnancy CoRonavIrus Outcomes RegIsTrY)

NCT04323839
View directory record Official record
Conditions
Pregnancy, Coronavirus, COVID-19
Interventions
Pregnant women under investigation for Coronavirus or diagnosed with COVID-19, Postpartum women under investigation for Coronavirus or diagnosed with COVID-19
Other
Lead sponsor
University of California, San Francisco
Other
Eligibility
13 Years and older · Female only
Enrollment
1,333 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated May 8, 2024 · Synced Oct 9, 2026, 2:02 AM EDT