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ClinicalTrials.gov public records Last synced Oct 2, 2026, 11:19 PM EDT

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Showing 97–120 of 3,394 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Respiratory Viral Infection Clear all
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Safety and Immunogenicity of Three Influenza Vaccines in Children Aged 4 Years Old to Less Than 18 Years Old

NCT01992107
View directory record Official record
Conditions
Influenza
Interventions
QIVc, TIV1c, TIV2c
Biological
Lead sponsor
Novartis Vaccines
Industry
Eligibility
4 Years to 18 Years
Enrollment
2,333 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
88
States / cities
Huntsville, Alabama • Mobile, Alabama • Chandler, Arizona + 73 more
Source: ClinicalTrials.gov public record
Updated Dec 8, 2015 · Synced Oct 2, 2026, 11:19 PM EDT
Not listed No phase listed Observational

National Vaccine Adverse Event Reporting Survey and Etiology

NCT05095844
View directory record Official record
Conditions
COVID-19, Vaccine Adverse Reaction, Vaccine Reaction, Vaccine or Biological Substance, Unspecified Causing Adverse Effects in Therapeutic Use, Corona Virus Infection, Blood Clot, Thrombocytopenia, Neuritis, Vasculitis, Influenza, Guillain-Barré, GWAS, Genetic Sequencing
Interventions
vaccinated
Biological
Lead sponsor
Neuroganics LLC
Industry
Eligibility
5 Years to 99 Years
Enrollment
100,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Northglenn, Colorado
Source: ClinicalTrials.gov public record
Updated Mar 18, 2022 · Synced Oct 2, 2026, 11:19 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

COVID-19: A Prevalence Study of Two ART Centres After the Pandemic Lockdown in the USA (COVID-19 Free Clinics)

NCT04466644
View directory record Official record
Conditions
COVID-19
Interventions
ELISA, RT-PCR
Diagnostic Test
Lead sponsor
Igenomix
Industry
Eligibility
18 Years and older
Enrollment
340 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
2
States / cities
Boston, Massachusetts • Pleasant Grove, Utah
Source: ClinicalTrials.gov public record
Updated Sep 14, 2020 · Synced Oct 2, 2026, 11:19 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Immunogenicity and Safety of Different Doses of Fluzone® Influenza

NCT00253734
View directory record Official record
Conditions
Influenza
Interventions
Fluzone® (IM), Fluzone®
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 49 Years
Enrollment
217 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2006
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jun 3, 2013 · Synced Oct 2, 2026, 11:19 PM EDT
Active, not recruiting No phase listed Observational

Duke COVID-19 Shared Data and Specimen Repository

NCT04368234
View directory record Official record
Conditions
COVID-19
Interventions
Not listed
Lead sponsor
Duke University
Other
Eligibility
Not listed
Enrollment
100,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2028
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 3, 2026 · Synced Oct 2, 2026, 11:19 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Safety, Reactogenicity, and Immunogenicity Study of mRNA-1045 (Influenza and Respiratory Syncytial Virus [RSV]) or mRNA-1230 (Influenza, RSV, and Severe Acute Respiratory Syndrome Coronavirus 2 [SARS-CoV-2]) Vaccine in Adults 50 to 75 Years Old

NCT05585632
View directory record Official record
Conditions
SARS-CoV-2, Influenza, RSV
Interventions
mRNA-1010, mRNA-1345, mRNA-1273.214, mRNA-1045, mRNA-1230
Biological
Lead sponsor
ModernaTX, Inc.
Industry
Eligibility
50 Years to 75 Years
Enrollment
392 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
14
States / cities
DeLand, Florida • Hollywood, Florida • St. Petersburg, Florida + 11 more
Source: ClinicalTrials.gov public record
Updated Mar 8, 2024 · Synced Oct 2, 2026, 11:19 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

BEYFORTUS™ (Nirsevimab) Effectiveness Against Medically-Attended RSV Events in Infants (BEAR Study)

NCT06325332
View directory record Official record
Conditions
Respiratory Syncytial Virus
Interventions
Nirsevimab
Other
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
0 Days to 12 Months
Enrollment
49,680 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Oakland, California
Source: ClinicalTrials.gov public record
Updated Nov 5, 2025 · Synced Oct 2, 2026, 11:19 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Phase IV Trial to Determine the Safety and Immunogenicity of the WHO Formulation of the 2006-2007 Fluzone® Vaccine

NCT00389532
View directory record Official record
Conditions
Influenza
Interventions
Influenza Virus Vaccine (2006-2007 Fluzone® vaccine)
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
18 Years and older
Enrollment
116 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2008
U.S. locations
1
States / cities
Norfolk, Virginia
Source: ClinicalTrials.gov public record
Updated Apr 14, 2016 · Synced Oct 2, 2026, 11:19 PM EDT
Completed No phase listed Observational

Incidence and Predictors of Acute and Chronic Complications in Patients With Diabetes and Severe COVID-19

NCT05200819
View directory record Official record
Conditions
Covid19, Diabetes Mellitus
Interventions
Not listed
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Dec 13, 2023 · Synced Oct 2, 2026, 11:19 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Stress and Recovery in Frontline COVID-19 Workers

NCT04713111
View directory record Official record
Conditions
Covid19, Stress, Wearables
Interventions
Lifestyle (Meditation), Lifestyle (Exercise)
Behavioral
Lead sponsor
4YouandMe
Other
Eligibility
18 Years and older
Enrollment
383 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Mar 12, 2021 · Synced Oct 2, 2026, 11:19 PM EDT
Terminated Phase 1 Interventional Accepts healthy volunteers Results available

Evaluating the Infectivity, Safety and Immunogenicity of a Recombinant Live-Attenuated Respiratory Syncytial Virus Vaccine (RSV LID cp ΔM2-2) in RSV-Seronegative Infants 6 to 24 Months of Age

NCT02890381
View directory record Official record
Conditions
Respiratory Syncytial Virus Infections
Interventions
RSV LID cp ΔM2-2 Vaccine, Placebo
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
6 Months to 24 Months
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
5
States / cities
Los Angeles, California • Aurora, Colorado • Chicago, Illinois + 2 more
Source: ClinicalTrials.gov public record
Updated Nov 5, 2021 · Synced Oct 2, 2026, 11:19 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Text-based Interventions to Promote COVID-19 Vaccinations

NCT04800965
View directory record Official record
Conditions
Covid19, Vaccines
Interventions
Patient MyChart Scheduling Link, Patient Educational Video, Enhanced Follow through Message
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years and older
Enrollment
200,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Westwood, Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Sep 13, 2022 · Synced Oct 2, 2026, 11:19 PM EDT
Recruiting Not applicable Interventional

Percutaneous Electrical Nerve Field Stimulation (PENFS) in Patients With Post Concussion Syndrome (PCS)

NCT04978571
View directory record Official record
Conditions
Post-Concussion Syndrome, COVID Long-Haul, COVID-19
Interventions
percutaneous electrical nerve-field stimulation, PENFS, percutaneous electrical nerve-field stimulation, PENFS (sham device), percutaneous electrical nerve-field stimulation, PENFS (COVID active device)
Device
Lead sponsor
Children's Hospital of Orange County
Other
Eligibility
11 Years to 18 Years
Enrollment
125 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
1
States / cities
Orange, California
Source: ClinicalTrials.gov public record
Updated Mar 18, 2026 · Synced Oct 2, 2026, 11:19 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Safety and Immunogenicity Study of a SARS-CoV-2 (COVID-19) Variant Vaccine (mRNA-1273.351) in Naïve and Previously Vaccinated Adults

NCT04785144
View directory record Official record
Conditions
COVID-19, COVID-19 Immunisation
Interventions
mRNA-1273, mRNA-1273.351
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 99 Years
Enrollment
135 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
4
States / cities
Decatur, Georgia • Cincinnati, Ohio • Nashville, Tennessee + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 18, 2024 · Synced Oct 2, 2026, 11:19 PM 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 2, 2026, 11:19 PM EDT
Completed Phase 1 Interventional Results available

Safety Study to Evaluate FluMist in Immunocompromised Children

NCT00112112
View directory record Official record
Conditions
Cancer
Interventions
FluMist, Placebo
Biological
Lead sponsor
MedImmune LLC
Industry
Eligibility
5 Years to 17 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2008
U.S. locations
5
States / cities
Rochester, New York • Stony Brook, New York • Memphis, Tennessee + 2 more
Source: ClinicalTrials.gov public record
Updated Aug 14, 2017 · Synced Oct 2, 2026, 11:19 PM EDT
Completed No phase listed Observational

Diagnostic and Prognostic Biomarkers for Childhood Bacterial Pneumonia

NCT03996967
View directory record Official record
Conditions
Pneumonia, Bacterial, Viral Infection, Clinical Pneumonia, Plasmodium Falciparum Malaria, Malaria, Infections, Respiratory
Interventions
Not listed
Lead sponsor
Boston University
Other
Eligibility
2 Months to 5 Years
Enrollment
837 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 31, 2022 · Synced Oct 2, 2026, 11:19 PM 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 20, 2020 · Synced Oct 2, 2026, 11:19 PM EDT
Recruiting Phase 2 Interventional

Omalizumab Before Onset of Exacerbations

NCT05332067
View directory record Official record
Conditions
Asthma in Children, Atopy, Viral Upper Respiratory Infection
Interventions
Omalizumab, Placebo
Drug
Lead sponsor
Children's National Research Institute
Other
Eligibility
6 Years to 17 Years
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2028
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Jul 14, 2025 · Synced Oct 2, 2026, 11:19 PM EDT
Completed Phase 3 Interventional Results available

Adaptive COVID-19 Treatment Trial 3 (ACTT-3)

NCT04492475
View directory record Official record
Conditions
COVID-19
Interventions
Interferon beta-1a, Placebo, Remdesivir
Drug · Other
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 99 Years
Enrollment
969 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020
U.S. locations
55
States / cities
Birmingham, Alabama • Fresno, California • La Jolla, California + 45 more
Source: ClinicalTrials.gov public record
Updated Mar 14, 2022 · Synced Oct 2, 2026, 11:19 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers Results available

Intranasal Heparin Tolerability Study

NCT04490239
View directory record Official record
Conditions
Covid19
Interventions
Intranasal heparin sodium (porcine)
Drug
Lead sponsor
Joshua Sharp
Other
Eligibility
18 Years to 65 Years
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
1
States / cities
University, Mississippi
Source: ClinicalTrials.gov public record
Updated Apr 30, 2021 · Synced Oct 2, 2026, 11:19 PM EDT
Completed Phase 3 Interventional Results available

Efficacy and Safety of Sofosbuvir Plus Ribavirin in Chronic Genotype 1, 2 and 3 Hepatitis C Virus (HCV) and Human Immunodeficiency Virus (HIV) Co-infected Adults

NCT01667731
View directory record Official record
Conditions
Hepatitis C, Human Immunodeficiency Virus
Interventions
SOF, RBV
Drug
Lead sponsor
Gilead Sciences
Industry
Eligibility
18 Years and older
Enrollment
224 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
26
States / cities
Birmingham, Alabama • Coronado, California • Los Angeles, California + 23 more
Source: ClinicalTrials.gov public record
Updated Nov 21, 2014 · Synced Oct 2, 2026, 11:19 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Annual Study for Collection of Serum Samples in Children and Older Adults Receiving the 2020-2021 Formulations of Fluzone Quadrivalent Vaccine and Fluzone High-Dose Quadrivalent Vaccine, Respectively

NCT04551677
View directory record Official record
Conditions
Influenza Immunization, Healthy Volunteers
Interventions
Fluzone Quadrivalent vaccine, No Preservative (0.5-mL dose), 2020-2021 formulation, Fluzone High-Dose Quadrivalent vaccine (0.7-mL dose), 2020-2021 formulation
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
6 Months to 84 Years
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
2
States / cities
Bardstown, Kentucky • Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Sep 12, 2025 · Synced Oct 2, 2026, 11:19 PM EDT
Terminated Phase 2 Interventional Accepts healthy volunteers Results available

A Trial Evaluating the Safety and Effects of an RNA Vaccine ARCT-021 in Healthy Adults

NCT04668339
View directory record Official record
Conditions
Covid19, SARS-CoV Infection, Corona Virus Infection
Interventions
ARCT-021 single dose priming, ARCT-021 two lower dose priming, ARCT-021 two higher dose priming, Placebo (two doses), priming, Randomized booster, Placebo booster
Biological
Lead sponsor
Arcturus Therapeutics, Inc.
Industry
Eligibility
18 Years and older
Enrollment
581 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
12
States / cities
Chandler, Arizona • Tucson, Arizona • San Diego, California + 9 more
Source: ClinicalTrials.gov public record
Updated May 15, 2025 · Synced Oct 2, 2026, 11:19 PM EDT