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ClinicalTrials.gov public records Last synced Oct 5, 2026, 6:57 AM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 49–72 of 110 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Covid-19+ observational Clear all
Completed No phase listed Observational Accepts healthy volunteers

Long-Term Experience and Health Effects of COVID-19

NCT04477902
View directory record Official record
Conditions
Covid19, Corona Virus Infection, Quality of Life, Risk Reduction
Interventions
none - observational
Other
Lead sponsor
Altura
Industry
Eligibility
18 Years to 100 Years
Enrollment
64 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Mission Viejo, California
Source: ClinicalTrials.gov public record
Updated Jun 24, 2021 · Synced Oct 5, 2026, 6:57 AM EDT
Terminated No phase listed Observational

The Nanowear Wearable Covid-19 Observational and Analysis Trend

NCT04717024
View directory record Official record
Conditions
Covid19
Interventions
Observational Study - no intervention
Device
Lead sponsor
Nanowear Inc.
Industry
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
2
States / cities
Hackensack, New Jersey • Brooklyn, New York
Source: ClinicalTrials.gov public record
Updated Apr 9, 2026 · Synced Oct 5, 2026, 6:57 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Rapid Development and Implementation of a Remote ECG-monitored Prospective Randomized Clinical Trial During a Pandemic: Hydroxychloroquine Prophylaxis in COVID-19 Household Contacts

NCT04652648
View directory record Official record
Conditions
Covid19, Hydroxychloroquine, Coronavirus Infection, Transmission, Prophylaxis
Interventions
Hydroxychloroquine
Drug
Lead sponsor
Bryn Mawr Hospital
Other
Eligibility
18 Years and older
Enrollment
54 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
3
States / cities
Bryn Mawr, Pennsylvania • Paoli, Pennsylvania • Wynnewood, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 3, 2020 · Synced Oct 5, 2026, 6:57 AM EDT
Completed No phase listed Observational

Effect of the COVID-19 Public Health Crisis on the Mental Health and Physical Well-Being of Cancer Patients, the Coping With COVID Study

NCT04652505
View directory record Official record
Conditions
COVID-19 Infection, Hematopoietic and Lymphoid Cell Neoplasm, Malignant Solid Neoplasm
Interventions
Questionnaire Administration
Other
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jan 14, 2022 · Synced Oct 5, 2026, 6:57 AM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Observational Study on the Use of Ivermectin as an Outpatient Treatment Option for COVID-19

NCT05045937
View directory record Official record
Conditions
Covid19, COVID-19 Pneumonia, COVID-19 Respiratory Infection, COVID-19 Acute Bronchitis
Interventions
Ivermectin
Drug
Lead sponsor
Patrick Robinson
Other
Eligibility
12 Years to 110 Years
Enrollment
1,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
San Antonio, Florida
Source: ClinicalTrials.gov public record
Updated Apr 27, 2022 · Synced Oct 5, 2026, 6:57 AM EDT
Completed No phase listed Observational

COVID-19: Pediatric Research Immune Network on SARS-CoV-2 and MIS-C

NCT04588363
View directory record Official record
Conditions
Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2), Multisystem Inflammatory Syndrome in Children (MIS-C), Coronavirus Disease 2019 (COVID-19)
Interventions
SARS-CoV-2 and/or MIS-C Exposure
Other
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
Up to 20 Years
Enrollment
244 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
20
States / cities
Loma Linda, California • Los Angeles, California • Palo Alto, California + 14 more
Source: ClinicalTrials.gov public record
Updated Feb 29, 2024 · Synced Oct 5, 2026, 6:57 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 5, 2026, 6:57 AM EDT
Completed No phase listed Observational

International Study of Inflammation in COVID-19

NCT04818866
View directory record Official record
Conditions
Covid19, Outcome, Fatal, Respiratory Failure, Acute Kidney Injury, Inflammation
Interventions
SuPAR, C-reactive protein, Ferritin, D-Dimer, Procalcitonin, Interleukin-6, Lactate Dehydrogenase
Diagnostic Test
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
4,463 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 Oct 31, 2023 · Synced Oct 5, 2026, 6:57 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 5, 2026, 6:57 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 5, 2026, 6:57 AM EDT
Active, not recruiting No phase listed Observational

NCI COVID-19 in Cancer Patients, NCCAPS Study

NCT04387656
View directory record Official record
Conditions
COVID-19 Infection, Hematopoietic and Lymphatic System Neoplasm, Malignant Solid Neoplasm, Metastatic Malignant Solid Neoplasm
Interventions
Biospecimen Collection, Data Collection, Quality-of-Life Assessment, Questionnaire Administration
Procedure · Other
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
Not listed
Enrollment
1,877 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
928
States / cities
Birmingham, Alabama • Mobile, Alabama • Anchorage, Alaska + 589 more
Source: ClinicalTrials.gov public record
Updated Oct 1, 2026 · Synced Oct 5, 2026, 6:57 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Understanding the Long-term Impact of COVID on Children and Families

NCT05172011
View directory record Official record
Conditions
SARS-CoV-2 Infection
Interventions
Not listed
Lead sponsor
NYU Langone Health
Other
Eligibility
Up to 25 Years
Enrollment
15,028 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
65
States / cities
Birmingham, Alabama • Little Rock, Arkansas • La Jolla, California + 51 more
Source: ClinicalTrials.gov public record
Updated Dec 31, 2025 · Synced Oct 5, 2026, 6:57 AM EDT
Terminated No phase listed Observational

Observational Study of COVID-19 Treatment Efficacy

NCT04369989
View directory record Official record
Conditions
Coronavirus, Coronavirus Infection, Corona Virus Infection, COVID, Sars-CoV2, Coronavirus as the Cause of Diseases Classified Elsewhere, SARS-Associated Coronavirus as Cause of Disease Classified Elsewhere, COVID-19, Coronavirus Disease, Coronavirus Sars-Associated as Cause of Disease Classified Elsewhere
Interventions
No intervention
Other
Lead sponsor
OSF Healthcare System
Other
Eligibility
18 Years and older
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Peoria, Illinois
Source: ClinicalTrials.gov public record
Updated Sep 29, 2022 · Synced Oct 5, 2026, 6:57 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

A Biospecimen Collection Study of Leukapheresis-Derived Circulating Tumor Cells, Immune Cells, and Progenitor Cells.

NCT00571389
View directory record Official record
Conditions
Solid Tumor, Adult, Healthy Donors, COVID-19 Donors
Interventions
Not listed
Lead sponsor
BioCytics, Inc.
Industry
Eligibility
5 Years and older
Enrollment
1,500 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2030
U.S. locations
1
States / cities
Huntersville, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 18, 2026 · Synced Oct 5, 2026, 6:57 AM EDT
Recruiting No phase listed Observational

Impact of COVID-19 Pandemic on Out-of-Pocket Costs, Lost Wages, and Unemployment in Patients With Breast Cancer Undergoing Breast Surgery

NCT04169542
View directory record Official record
Conditions
Breast Ductal Carcinoma In Situ, COVID-19 Infection, Hereditary Breast Carcinoma, Invasive Breast Carcinoma
Interventions
Questionnaire Administration
Other
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older · Female only
Enrollment
600 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2028
U.S. locations
4
States / cities
Conroe, Texas • Houston, Texas • League City, Texas + 1 more
Source: ClinicalTrials.gov public record
Updated May 4, 2026 · Synced Oct 5, 2026, 6:57 AM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Neural and Cognitive Consequences of COVID-19 Survival

NCT06208943
View directory record Official record
Conditions
COVID Long-Haul, COVID-19, COVID-19 Pandemic, Brain Fog, Memory Deficits, Concentration Ability Impaired, Fatigue
Interventions
cross-sectional MRI and EEG assessments (NO INTERVENTION)
Other
Lead sponsor
San Francisco Veterans Affairs Medical Center
Federal
Eligibility
18 Years to 70 Years
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Apr 12, 2024 · Synced Oct 5, 2026, 6:57 AM EDT
Completed No phase listed Observational

An Observational Study, Called ROCURS, to Learn About COVID-19 Related Outcomes in People With Cancer Who Are Treated With Tyrosine Kinase Inhibitors (TKIs) Including Regorafenib or Sorafenib

NCT05594147
View directory record Official record
Conditions
Malignant Solid Tumors, Coronavirus Disease 2019 (COVID-19), SARS-CoV-2 Infection
Interventions
Non-TKIs, Other TKIs, Regorafenib (Stivarga, BAY73- 4506), Sorafenib (Nexavar, BAY43-9006)
Drug
Lead sponsor
Bayer
Industry
Eligibility
18 Years and older
Enrollment
4,103 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Whippany, New Jersey
Source: ClinicalTrials.gov public record
Updated Nov 7, 2023 · Synced Oct 5, 2026, 6:57 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 5, 2026, 6:57 AM EDT
Completed No phase listed Observational

COVID-19 in Patients With HIV

NCT04333953
View directory record Official record
Conditions
HIV/AIDS, COVID-19, SARS-CoV-2
Interventions
No intervention
Other
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
Not listed
Enrollment
412 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated May 23, 2022 · Synced Oct 5, 2026, 6:57 AM EDT
Completed Phase 1 Interventional

Transfer of Infection Fighting Immune Cells Generated in the Laboratory to High Risk Patients With COVID-19 Infection

NCT04765449
View directory record Official record
Conditions
Covid19
Interventions
Cytotoxic T Lymphocytes
Drug
Lead sponsor
Thomas Jefferson University
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 29, 2025 · Synced Oct 5, 2026, 6:57 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 5, 2026, 6:57 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Isolated During COVID-19: Effects of COVID-19's Social Restrictions on Loneliness and Psychosocial Symptomatology

NCT04440098
View directory record Official record
Conditions
Loneliness, Depression, Anxiety, Alcohol Abuse, Drug Abuse
Interventions
Not listed
Lead sponsor
University of Miami
Other
Eligibility
18 Years to 35 Years
Enrollment
1,008 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Jun 19, 2020 · Synced Oct 5, 2026, 6:57 AM EDT
Active, not recruiting No phase listed Observational

Pain in Long COVID-19: the Role of Sleep

NCT05606211
View directory record Official record
Conditions
Long COVID
Interventions
No intervention
Other
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years to 85 Years
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 24, 2025 · Synced Oct 5, 2026, 6:57 AM EDT