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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 (Healthy Volunteers) Clear all
Completed Phase 2 Interventional Accepts healthy volunteers Results available

A Study to Learn About Two or More Vaccines That Are Put Together as One Shot Against Infectious Lung Illnesses, Including COVID-19 and Respiratory Syncytial Virus (RSV).

NCT05886777
View directory record Official record
Conditions
Healthy Participants
Interventions
Combination [RSVpreF+BNTb162b2], Bivalent BNT162b2 (original/Omi BA.4/BA.5), RSVpreF, QIV, Normal Saline Placebo
Biological
Lead sponsor
Pfizer
Industry
Eligibility
65 Years and older
Enrollment
1,142 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
37
States / cities
Dublin, California • Huntington Beach, California • Lake Forest, California + 26 more
Source: ClinicalTrials.gov public record
Updated Dec 17, 2024 · Synced Jul 24, 2026, 3:09 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Study of a Quadrivalent High-Dose Influenza Vaccine and a Moderna COVID-19 Vaccine Administered Either Concomitantly or Singly in Participants 65 Years of Age and Older Previously Vaccinated With a 2-dose Schedule of Moderna COVID-19 Vaccine

NCT04969276
View directory record Official record
Conditions
Influenza Immunization, Healthy Volunteers
Interventions
Quadrivalent Inactivated Influenza High Dose, COVID-19 mRNA Vaccine (nucleoside modified)
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
65 Years and older
Enrollment
306 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
6
States / cities
Glendale, Arizona • San Diego, California • Vista, California + 3 more
Source: ClinicalTrials.gov public record
Updated Sep 11, 2025 · Synced Jul 24, 2026, 3:09 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Safety and Immunogenicity Trial of an Oral SARS-CoV-2 Vaccine (VXA-CoV2-1) for Prevention of COVID-19 in Healthy Adults and Boost (VXA-CoV2-1.1-S) at 1 Year Post Initial Vaccination in Subset of Subjects

NCT04563702
View directory record Official record
Conditions
Covid19
Interventions
VXA-CoV2-1
Biological
Lead sponsor
Vaxart
Industry
Eligibility
18 Years to 54 Years
Enrollment
35 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Cypress, California
Source: ClinicalTrials.gov public record
Updated Jun 20, 2024 · Synced Jul 24, 2026, 3:09 AM EDT
Not listed Phase 1 Interventional

Safety, Tolerability and Pharmacokinetics of Inhaled Nanoparticle Formulation of Remdesivir (GS-5734) and NA-831

NCT04480333
View directory record Official record
Conditions
Covid19, Corona Virus Infection, Severe Acute Respiratory Syndrome, Severe Acute Respiratory Infection, Severe Acute Respiratory Syndrome (SARS) Pneumonia, Severe Acute Respiratory Syndrome of Upper Respiratory Tract, Neurodegeneration, Neuroinflammatory Response
Interventions
Drug: NA-831 - 0.10 mg/kg, Placebo- 0.10 mg/kg, Drug: NA-831 - 0.20 mg/kg, Placebo- 0.20 mg/kg, Drug: GS-5734 - 1.00 mg/kg, Placebo- 1.00 mg/kg, Drug: GS-5734 - 2.00 mg/kg, Placebo- 2.00 mg/kg, Drugs: NA-831 (0.10 mg/kg) plus GS-5734 (1.00 mg/kg), Placebo 0.10 mg + 1.00 mg/kg, Drugs: NA-831 (0.20 mg/kg) plus GS-5734 (2.00 mg/kg), Placebo 0.20 mg + 2.00 mg/kg
Drug · Combination Product
Lead sponsor
Biomed Industries, Inc.
Industry
Eligibility
21 Years to 50 Years
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Sunnyvale, California
Source: ClinicalTrials.gov public record
Updated Jul 20, 2020 · Synced Jul 24, 2026, 3:09 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Safety and Immunogenicity of RNA-based Vaccines Against SARS-CoV-2 Variants in Healthy Participants

NCT05004181
View directory record Official record
Conditions
SARS-CoV-2 Infection, COVID-19, SARS-CoV-2 Acute Respiratory Disease, SARS (Disease)
Interventions
BNT162b2, Multivalent BNT162b2 (B.1.1.7 + B.1.617.2), Monovalent BNT162b2 (B.1.1.7), Monovalent BNT162b2 (B.1.617.2), Monovalent BNT162b2 (B.1.1.529.1), Observational
Biological · Other
Lead sponsor
BioNTech SE
Industry
Eligibility
18 Years to 85 Years
Enrollment
1,380 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
14
States / cities
Long Beach, California • San Diego, California • Milford, Connecticut + 10 more
Source: ClinicalTrials.gov public record
Updated Nov 21, 2024 · Synced Jul 24, 2026, 3:09 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

TD-0903 Pharmacokinetics Study in Healthy Participants With Supplemental Oxygenation

NCT05091723
View directory record Official record
Conditions
Acute Lung Injury (ALI) Due to Coronavirus Disease-2019 (COVID-19)
Interventions
Nezulcitinib (TD-0903) Dose A, Nezulcitinib (TD-0903) Dose B
Drug
Lead sponsor
Theravance Biopharma
Industry
Eligibility
18 Years to 65 Years
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Cypress, California
Source: ClinicalTrials.gov public record
Updated Dec 9, 2021 · Synced Jul 24, 2026, 3:09 AM EDT
Completed No phase listed Observational

Emotional, Social, Cognitive and Behavioral Sequalae of the COVID-19 Pandemic

NCT04823988
View directory record Official record
Conditions
Healthy Volunteer
Interventions
Not listed
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
18 Years to 99 Years
Enrollment
2,086 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated May 30, 2025 · Synced Jul 24, 2026, 3:09 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Vaccine Responses to SARS-CoV-2 and Other Emerging Infectious Diseases

NCT05078905
View directory record Official record
Conditions
COVID-19, Vaccination, Healthy Volunteer
Interventions
Not listed
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years and older
Enrollment
1,200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2050
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated May 7, 2026 · Synced Jul 24, 2026, 3:09 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Relative Bioavailability Study of Nirmatrelvir/Ritonavir 4 Different Fixed Dose Combination Tablets Relative to the Commercial Tablets in Healthy Participants

NCT05525910
View directory record Official record
Conditions
Biological Availability, Healthy Participants
Interventions
Nirmatrelvir/ ritonavir
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Sep 18, 2024 · Synced Jul 24, 2026, 3:09 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

COVID-19 Vaccination Using a 2nd Generation (E1/E2B/E3-Deleted) Adenoviral-COVID-19 in Normal Healthy Volunteers

NCT04591717
View directory record Official record
Conditions
COVID-19
Interventions
hAd5-S-Fusion+N-ETSD vaccine
Biological
Lead sponsor
ImmunityBio, Inc.
Industry
Eligibility
18 Years to 55 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2023
U.S. locations
2
States / cities
El Segundo, California • Newport Beach, California
Source: ClinicalTrials.gov public record
Updated Feb 27, 2023 · Synced Jul 24, 2026, 3:09 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Study to Evaluate the Safety, Tolerability and Pharmacokinetics of Orally Inhaled Aerosolized Hydroxychloroquine Sulfate in Healthy Adult Volunteers

NCT04461353
View directory record Official record
Conditions
Severe Acute Respiratory Syndrome Coronavirus 2
Interventions
Aerolized Hydroxychloroquine Sulfate, Placebo
Drug · Other
Lead sponsor
Pulmoquine Therapeutics, Inc
Industry
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 7, 2020 · Synced Jul 24, 2026, 3:09 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Safety, Tolerability, and Pharmacokinetics of SAB-185 in Healthy Participants

NCT04468958
View directory record Official record
Conditions
COVID-19, SARS-CoV2
Interventions
SAB-185, Normal saline
Biological · Other
Lead sponsor
SAb Biotherapeutics, Inc.
Industry
Eligibility
18 Years to 60 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
3
States / cities
Wichita, Kansas • Syracuse, New York • San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Jun 30, 2022 · Synced Jul 24, 2026, 3:09 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

KBP-201 COVID-19 Vaccine Trial in Healthy Volunteers

NCT04473690
View directory record Official record
Conditions
Covid19
Interventions
Low Dose of KBP-COVID-19, High Dose of KBP-COVID-19, Placebo
Biological
Lead sponsor
KBio Inc
Industry
Eligibility
18 Years to 85 Years
Enrollment
102 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
6
States / cities
West Palm Beach, Florida • Meridian, Idaho • Winston-Salem, North Carolina + 3 more
Source: ClinicalTrials.gov public record
Updated May 17, 2025 · Synced Jul 24, 2026, 3:09 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Relative Bioavailability Study of PF-07321332/Ritonavir Oral Powder Relative to the Commercial Tablets in Healthy Participants

NCT05263921
View directory record Official record
Conditions
Bioavailability
Interventions
PF-07321332/ritonavir
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jun 5, 2024 · Synced Jul 24, 2026, 3:09 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Renal Impairment Study of PF-07321332 Boosted With Ritonavir in Adult Participants With Renal Impairment and in Healthy Participants With Normal Renal Function.

NCT04909853
View directory record Official record
Conditions
Renal Impairment
Interventions
PF-07321332/ritonavir
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years to 75 Years
Enrollment
35 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
5
States / cities
Tustin, California • Miami, Florida • Tampa, Florida + 1 more
Source: ClinicalTrials.gov public record
Updated Aug 1, 2023 · Synced Jul 24, 2026, 3:09 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Study Assessing the Safety, Tolerability, Pharmacokinetics, and Immunogenicity of Repeated Subcutaneous Doses of Anti-Spike (S) SARS-CoV-2 Monoclonal Antibodies (REGN10933+REGN10987) in Adult Volunteers as Related to COVID-19

NCT04519437
View directory record Official record
Conditions
Healthy, Chronic Stable Illness
Interventions
REGN10933+REGN10987, Placebo
Drug
Lead sponsor
Regeneron Pharmaceuticals
Industry
Eligibility
18 Years to 90 Years
Enrollment
974 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
7
States / cities
Tempe, Arizona • Rogers, Arkansas • Sacramento, California + 4 more
Source: ClinicalTrials.gov public record
Updated Jan 25, 2022 · Synced Jul 24, 2026, 3:09 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Phase 1 Study on Bioavailability, Food Effect, and Drug-Drug Interaction of ALG-097558 Tablets in Healthy Volunteers

NCT06945276
View directory record Official record
Conditions
COVID-19
Interventions
ALG-097558, Dabigatran, Itraconazole, Placebo
Drug · Other
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 65 Years
Enrollment
51 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated May 17, 2026 · Synced Jul 24, 2026, 3:09 AM 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 19, 2025 · Synced Jul 24, 2026, 3:09 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

PF-07321332/Ritonavir and Ritonavir on Dabigatran Study in Healthy Participants

NCT05064800
View directory record Official record
Conditions
Healthy Participants
Interventions
Dabigatran, PF-07321332/ritonavir + Dabigatran, Ritonavir + Dabigatran
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years to 60 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Hollywood, Florida
Source: ClinicalTrials.gov public record
Updated Mar 28, 2024 · Synced Jul 24, 2026, 3:09 AM EDT
Terminated Phase 1 Interventional Accepts healthy volunteers

iCP-NI - Safety, Tolerability, Pharmacokinetic, and Immunogenicity Study in Healthy Male and Female Subjects

NCT05740280
View directory record Official record
Conditions
Healthy Volunteers
Interventions
iCP-NI, Placebo
Drug
Lead sponsor
Cellivery Therapeutics, Inc.
Industry
Eligibility
18 Years to 55 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Daytona Beach, Florida
Source: ClinicalTrials.gov public record
Updated Sep 18, 2025 · Synced Jul 24, 2026, 3:09 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

COVID-19 Study Assessing the Safety and Tolerability of Co-Formulated Anti-Spike (S) SARS-CoV-2 Monoclonal Antibodies (Casirivimab+Imdevimab) in Adult Volunteers

NCT05181683
View directory record Official record
Conditions
Healthy, Chronic Stable Illness
Interventions
Casirivimab+Imdevimab
Drug
Lead sponsor
Regeneron Pharmaceuticals
Industry
Eligibility
18 Years to 65 Years
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
2
States / cities
Miami, Florida • Winter Park, Florida
Source: ClinicalTrials.gov public record
Updated Oct 13, 2025 · Synced Jul 24, 2026, 3:09 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Drug-Drug Interaction Study Between EDP-235, Itraconazole, Carbamazepine and Quinidine in Healthy Subjects.

NCT05594602
View directory record Official record
Conditions
COVID-19
Interventions
EDP-235, Itraconazole, Carbamazepine, Quinidine
Drug
Lead sponsor
Enanta Pharmaceuticals, Inc
Industry
Eligibility
18 Years to 55 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Lenexa, Kansas
Source: ClinicalTrials.gov public record
Updated Apr 26, 2023 · Synced Jul 24, 2026, 3:09 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Variation In Facial Morphology As A Determinant Of Face Covering Performance: FACEFIT

NCT05388201
View directory record Official record
Conditions
Healthy
Interventions
N95, KN95, KF94, Surgical
Other
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 55 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 28, 2024 · Synced Jul 24, 2026, 3:09 AM EDT
Active, not recruiting Phase 3 Interventional Accepts healthy volunteers

A Study to Learn About a COVID-19 Vaccine in Healthy Adults 50 Through 64 Years of Age

NCT07300839
View directory record Official record
Conditions
COVID-19, SARS-COV-2 Infection
Interventions
BNT162b2 Vaccine, Placebo
Biological
Lead sponsor
BioNTech SE
Industry
Eligibility
50 Years to 64 Years
Enrollment
5,240 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
196
States / cities
Anniston, Alabama • Athens, Alabama • Birmingham, Alabama + 148 more
Source: ClinicalTrials.gov public record
Updated Apr 12, 2026 · Synced Jul 24, 2026, 3:09 AM EDT