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Showing 1–24 of 3,348 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Respiratory Virus Infections Clear all
Terminated Phase 2 Interventional

Study of Obeldesivir to Treat Children With Respiratory Syncytial Virus (RSV) Infection

NCT06784973
View directory record Official record
Conditions
RSV Infection
Interventions
Obeldesivir, Obeldesivir Placebo
Drug
Lead sponsor
Gilead Sciences
Industry
Eligibility
Up to 5 Years
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025
U.S. locations
41
States / cities
Birmingham, Alabama • Oneonta, Alabama • Phoenix, Arizona + 33 more
Source: ClinicalTrials.gov public record
Updated Jun 24, 2025 · Synced Jun 7, 2026, 5:50 AM EDT
Completed Phase 2 Interventional

Adefovir Dipivoxil to Treat Hepatitis B in HIV-Infected Patients

NCT00013702
View directory record Official record
Conditions
Hepatitis B, HIV Infection
Interventions
Adefovir
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
Not listed
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2004
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Jun 7, 2026, 5:50 AM EDT
Completed No phase listed Observational

Epidemiology Of Respiratory Virus Infections In Children

NCT01167361
View directory record Official record
Conditions
Respiratory Virus Infection
Interventions
Not listed
Lead sponsor
St. Jude Children's Research Hospital
Other
Eligibility
Up to 18 Years
Enrollment
350 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 30, 2012 · Synced Jun 7, 2026, 5:50 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Cellular and Humoral Immune Response to Primary and Secondary Immunization With Subvirion H5N1 Vaccines

NCT01086566
View directory record Official record
Conditions
Influenza
Interventions
Influenza Virus Vaccine, Monovalent A/H5N1 A/Indonesia/05/2005
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 64 Years
Enrollment
95 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Dec 31, 2015 · Synced Jun 7, 2026, 5:50 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Half-Dose Flu Vaccine Study in Healthy Adults

NCT00006146
View directory record Official record
Conditions
Influenza
Interventions
Approved influenza virus vaccine.
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 49 Years
Enrollment
840 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2000
U.S. locations
6
States / cities
Torrance, California • College Park, Maryland • St Louis, Missouri + 3 more
Source: ClinicalTrials.gov public record
Updated Aug 26, 2010 · Synced Jun 7, 2026, 5:50 AM EDT
Not listed Phase 1 Interventional

Regenerative Medicine for COVID-19 and Flu-Elicited ARDS Using Lomecel-B (RECOVER)

NCT04629105
View directory record Official record
Conditions
ARDS, Human, Covid19
Interventions
Longeveron Mesenchymal Stem Cells (LMSCs), Placebo
Biological · Other
Lead sponsor
Longeveron Inc.
Industry
Eligibility
18 Years and older
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2025
U.S. locations
3
States / cities
Miami, Florida • Baltimore, Maryland • Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 19, 2024 · Synced Jun 7, 2026, 5:50 AM EDT
Terminated Phase 2 Interventional

Safety and Efficacy of Dapansutrile for Treatment of Moderate COVID-19 Symptoms and Evidence of Early Cytokine Release Syndrome

NCT04540120
View directory record Official record
Conditions
Covid19, Cytokine Release Syndrome
Interventions
dapansutrile capsules, placebo capsules
Drug
Lead sponsor
Olatec Therapeutics LLC
Industry
Eligibility
18 Years and older
Enrollment
49 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
9
States / cities
Coral Gables, Florida • Fort Lauderdale, Florida • Hialeah, Florida + 6 more
Source: ClinicalTrials.gov public record
Updated Apr 12, 2023 · Synced Jun 7, 2026, 5:50 AM EDT
Completed No phase listed Observational

International Registry of Coronavirus (COVID-19) Exposure in Pregnancy

NCT04366986
View directory record Official record
Conditions
Covid-19
Interventions
Tested for SARS-CoV-2 (regardless of the result), Clinical diagnosis of COVID-19 by a health care professional
Other
Lead sponsor
Pregistry
Industry
Eligibility
18 Years and older · Female only
Enrollment
17,318 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Sep 27, 2021 · Synced Jun 7, 2026, 5:50 AM EDT
Recruiting Not applicable Interventional

Addressing Vaccine Acceptance in Carceral Settings Through Community Engagement

NCT05796505
View directory record Official record
Conditions
COVID-19
Interventions
ADVANCE Steering Committee interventions
Behavioral
Lead sponsor
Yale University
Other
Eligibility
18 Years and older
Enrollment
37,122 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Schwenksville, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Nov 20, 2025 · Synced Jun 7, 2026, 5:50 AM EDT
Not listed Not applicable Interventional

Immunogenicity of Influenza Vaccine in Long Term Care

NCT02933723
View directory record Official record
Conditions
Influenza
Interventions
Blood Draw
Procedure
Lead sponsor
Insight Therapeutics, LLC
Other
Eligibility
65 Years and older
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2021
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 8, 2021 · Synced Jun 7, 2026, 5:50 AM EDT
Terminated Phase 1 Interventional

Safety and Tolerability of Emricasan in Symptomatic Outpatients Diagnosed With Mild-COVID-19

NCT04803227
View directory record Official record
Conditions
Covid19
Interventions
Emricasan, Placebo
Drug · Other
Lead sponsor
Histogen
Industry
Eligibility
18 Years and older
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
Brooklyn, New York
Source: ClinicalTrials.gov public record
Updated Jan 3, 2022 · Synced Jun 7, 2026, 5:50 AM EDT
Completed Phase 3 Interventional Results available

ACTIV-3b: Therapeutics for Severely Ill Inpatients With COVID-19

NCT04843761
View directory record Official record
Conditions
Covid19
Interventions
Remdesivir, Remdesivir Placebo, Aviptadil, Aviptadil Placebo, Corticosteroid
Biological · Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years and older
Enrollment
473 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
40
States / cities
Tucson, Arizona • Fresno, California • Loma Linda, California + 28 more
Source: ClinicalTrials.gov public record
Updated Oct 23, 2025 · Synced Jun 7, 2026, 5:50 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

A Study to Evaluate the Shedding and Safety of Trivalent Influenza Virus Vaccine Live, Intranasal in Infants and Young Children

NCT00344305
View directory record Official record
Conditions
Healthy
Interventions
Trivalent influenza virus vaccine live, intranasal
Biological
Lead sponsor
MedImmune LLC
Industry
Eligibility
6 Months to 59 Months
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006
U.S. locations
16
States / cities
Little Rock, Arkansas • Marietta, Georgia • Bardstown, Kentucky + 13 more
Source: ClinicalTrials.gov public record
Updated Jul 23, 2017 · Synced Jun 7, 2026, 5:50 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 13, 2022 · Synced Jun 7, 2026, 5:50 AM EDT
Terminated Phase 4 Interventional Accepts healthy volunteers

Comparison of Recombinant Influenza Vaccine Versus Standard Egg-Based Inactivated Influenza Vaccine in Adults 18-64 Years

NCT05514002
View directory record Official record
Conditions
Influenza, Human
Interventions
Fluzone Quadrivalent, Flublok Quadrivalent
Biological
Lead sponsor
Fatimah Dawood
Federal
Eligibility
18 Years to 64 Years
Enrollment
3,988 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
4
States / cities
Tucson, Arizona • Tallahassee, Florida • Houston, Texas + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 23, 2025 · Synced Jun 7, 2026, 5:50 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

A Study to Evaluate the Efficacy of an RSV F Vaccine in Older Adults

NCT02608502
View directory record Official record
Conditions
Respiratory Syncytial Virus (RSV)
Interventions
RSV-F Vaccine, Phosphate Buffer Placebo
Biological
Lead sponsor
Novavax
Industry
Eligibility
60 Years and older
Enrollment
11,850 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
60
States / cities
Birmingham, Alabama • Mobile, Alabama • Mesa, Arizona + 51 more
Source: ClinicalTrials.gov public record
Updated Jul 18, 2022 · Synced Jun 7, 2026, 5:50 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Exhaled Nitric Oxide in Respiratory Syncytial Virus (RSV) Bronchiolitis: a Pilot Study

NCT01090557
View directory record Official record
Conditions
RSV Infection, Bronchiolitis
Interventions
Collection of exhaled breath
Other
Lead sponsor
Winthrop University Hospital
Other
Eligibility
1 Day to 4 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2009
U.S. locations
1
States / cities
Mineola, New York
Source: ClinicalTrials.gov public record
Updated Mar 21, 2010 · Synced Jun 7, 2026, 5:50 AM EDT
Completed Not applicable Interventional Results available

High-risk Influenza Vaccine Alert

NCT05492786
View directory record Official record
Conditions
Influenza
Interventions
Alert, Salient alert features, High-risk Text, Risk factors
Behavioral
Lead sponsor
Geisinger Clinic
Other
Eligibility
18 Years and older
Enrollment
80,452 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Danville, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 29, 2024 · Synced Jun 7, 2026, 5:50 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Control of Epidemic Influenza Through a School-based Influenza Vaccination Program

NCT00138294
View directory record Official record
Conditions
Influenza
Interventions
live attenuated and inactivated influenza vaccines
Biological
Lead sponsor
Baylor College of Medicine
Other
Eligibility
4 Years to 18 Years
Enrollment
29,255 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1998 – 2010
U.S. locations
2
States / cities
Temple, Texas • Waco, Texas
Source: ClinicalTrials.gov public record
Updated May 18, 2017 · Synced Jun 7, 2026, 5:50 AM EDT
Completed Phase 2 Interventional Results available

High Dose Flu Vaccine in Treating Children Who Have Undergone Donor Stem Cell Transplant

NCT02860039
View directory record Official record
Conditions
Hematopoietic Cell Transplantation Recipient, Malignant Neoplasm, Influenza
Interventions
Trivalent Influenza Vaccine, Quadrivalent Influenza Vaccine, Laboratory Biomarker Analysis
Biological · Other
Lead sponsor
Vanderbilt-Ingram Cancer Center
Other
Eligibility
3 Years to 17 Years
Enrollment
170 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2024
U.S. locations
9
States / cities
San Francisco, California • Kansas City, Missouri • Cincinnati, Ohio + 6 more
Source: ClinicalTrials.gov public record
Updated Oct 21, 2024 · Synced Jun 7, 2026, 5:50 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Efficacy Study of Two Influenza Vaccines and Placebo in Healthy Adult Subjects

NCT00630331
View directory record Official record
Conditions
Influenza
Interventions
Cell culture-derived influenza vaccine, Egg-derived influenza virus vaccine, Placebo
Biological
Lead sponsor
Novartis Vaccines
Industry
Eligibility
18 Years to 49 Years
Enrollment
11,404 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
17
States / cities
Denver, Colorado • Pembroke Pines, Florida • South Miami, Florida + 13 more
Source: ClinicalTrials.gov public record
Updated May 23, 2024 · Synced Jun 7, 2026, 5:50 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

Immunogenicity and Safety of FluBlok Trivalent Recombinant Hemagglutinin Influenza Vaccine in Healthy Pediatrics

NCT00336453
View directory record Official record
Conditions
Influenza
Interventions
Influenza Vaccination
Biological
Lead sponsor
Protein Sciences Corporation
Industry
Eligibility
6 Months to 59 Months
Enrollment
156 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2007
U.S. locations
3
States / cities
Bardstown, Kentucky • St Louis, Missouri • Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 16, 2009 · Synced Jun 7, 2026, 5:50 AM EDT
Completed No phase listed Observational

Intranasal Lavage With Hypochlorous Acid Safely Reduces the Symptoms in the Ambulatory Patient With COVID-19.

NCT05950295
View directory record Official record
Conditions
COVID-19
Interventions
Intranasal lavage with hypochlorous acid solution
Other
Lead sponsor
Monique Lisa Abner
Other
Eligibility
18 Years and older
Enrollment
88 participants
Timeline
2020 – 2021
U.S. locations
1
States / cities
Reading, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 17, 2023 · Synced Jun 7, 2026, 5:50 AM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Changes in Seroprevalence and Wellness Over Time in Healthcare Workers (CONSERVE-HCW)

NCT04595175
View directory record Official record
Conditions
COVID-19 Infection
Interventions
Not listed
Lead sponsor
Brian Tiffany, MD
Other
Eligibility
18 Years and older
Enrollment
2,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Chandler, Arizona
Source: ClinicalTrials.gov public record
Updated Oct 19, 2020 · Synced Jun 7, 2026, 5:50 AM EDT