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ClinicalTrials.gov public records Last synced Oct 13, 2026, 6:35 PM EDT

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Showing 169–192 of 3,924 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Respiratory Tract Infections (RTI) Clear all
Completed Phase 3 Interventional Results available

A Study of Exercise Endurance and Lung Hyperinflation in Patients With Moderate to Severe Chronic Obstructive Pulmonary Disease (COPD)

NCT00500318
View directory record Official record
Conditions
Pulmonary Disease, Chronic Obstructive
Interventions
Aclidinium Bromide, Placebo
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
40 Years and older
Enrollment
181 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
42
States / cities
Jasper, Alabama • Phoenix, Arizona • Long Beach, California + 33 more
Source: ClinicalTrials.gov public record
Updated Jan 6, 2017 · Synced Oct 13, 2026, 6:35 PM EDT
Terminated Phase 3 Interventional Results available

Intramuscular Peramivir in Subjects With Uncomplicated Acute Influenza

NCT00610935
View directory record Official record
Conditions
Influenza
Interventions
Peramivir, Placebo
Drug
Lead sponsor
BioCryst Pharmaceuticals
Industry
Eligibility
18 Years to 75 Years
Enrollment
82 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008
U.S. locations
96
States / cities
Millbrook, Alabama • Tuscaloosa, Alabama • Phoenix, Arizona + 80 more
Source: ClinicalTrials.gov public record
Updated Mar 17, 2021 · Synced Oct 13, 2026, 6:35 PM EDT
Withdrawn Phase 2 Interventional

Hydroxychloroquine Treatment of Healthcare Workers With COVID19 Illness at Montefiore

NCT04350450
View directory record Official record
Conditions
COVID, Coronavirus, COVID-19
Interventions
Hydroxychloroquine
Drug
Lead sponsor
Montefiore Medical Center
Other
Eligibility
18 Years to 99 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated May 27, 2020 · Synced Oct 13, 2026, 6:35 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of Probiotics (L. Helveticus, B. Longum, and B. Bifidum) on Immune Function and Digestive Health

NCT01709825
View directory record Official record
Conditions
Healthy
Interventions
Probiotic- Bifidobacterium Bifidum, Sugar Pill, Probiotic- Lactobacillus helveticus, Probiotic- Bifidobacterium longum ss. Infantis R0033
Dietary Supplement
Lead sponsor
University of Florida
Other
Eligibility
18 Years and older
Enrollment
583 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jan 29, 2015 · Synced Oct 13, 2026, 6:35 PM EDT
Terminated No phase listed Observational Accepts healthy volunteers

WheezoMeter® Correlation Study

NCT01556958
View directory record Official record
Conditions
Asthma, Bronchiolitis
Interventions
Not listed
Lead sponsor
iSonea
Industry
Eligibility
Up to 12 Years
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Folsom, California
Source: ClinicalTrials.gov public record
Updated Aug 19, 2013 · Synced Oct 13, 2026, 6:35 PM EDT
Not listed No phase listed Observational

Evaluation of the IND One Step Strep A Rapid Test vs. Culture

NCT01491776
View directory record Official record
Conditions
Strep Throat
Interventions
Not listed
Lead sponsor
IND Diagnostic Inc.
Industry
Eligibility
3 Years and older
Enrollment
315 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
3
States / cities
Bellevue, Nebraska • Franklin, Tennessee • Smyrna, Tennessee
Source: ClinicalTrials.gov public record
Updated Mar 8, 2012 · Synced Oct 13, 2026, 6:35 PM EDT
Terminated No phase listed Observational

COVID Cohort Study

NCT04393155
View directory record Official record
Conditions
COVID-19, Acute Respiratory Failure
Interventions
COVID-19+ observational
Other
Lead sponsor
University of Vermont
Other
Eligibility
18 Years and older
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Burlington, Vermont
Source: ClinicalTrials.gov public record
Updated Feb 12, 2021 · Synced Oct 13, 2026, 6:35 PM EDT
Completed Not applicable Interventional

Pediatric Second Influenza Dose Portal Reminder Recall

NCT04668417
View directory record Official record
Conditions
Influenza, Respiratory Tract Infections
Interventions
Portal Reminders for Second Dose of Influenza Vaccine with Direct Scheduling Link, Portal Reminders for Second Dose of Influenza Vaccine without Direct Scheduling Link
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
6 Months to 36 Months
Enrollment
698 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 May 28, 2021 · Synced Oct 13, 2026, 6:35 PM EDT
Not listed No phase listed Observational

Risk Stratification of COVID-19 Using Urine Biomarkers

NCT04681040
View directory record Official record
Conditions
Covid19, Urine, Biomarker, Acute Respiratory Failure With Hypoxia
Interventions
Not listed
Lead sponsor
National Center for Global Health and Medicine, Japan
Government
Eligibility
20 Years and older
Enrollment
964 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 27, 2024 · Synced Oct 13, 2026, 6:35 PM EDT
Completed Phase 2 Interventional Results available

Strategies To Prevent Pneumonia 2 (SToPP2)

NCT00893763
View directory record Official record
Conditions
Infections, Hospital, Ventilator-Associated Pneumonia, Mechanical Ventilation Complication
Interventions
Pre-intubation CHX, Control
Procedure
Lead sponsor
University of South Florida
Other
Eligibility
18 Years and older
Enrollment
314 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Jan 11, 2016 · Synced Oct 13, 2026, 6:35 PM EDT
Terminated No phase listed Observational

COVID-19 (Coronavirus Disease-2019) Psychiatric Outcomes

NCT05119400
View directory record Official record
Conditions
Covid19, Anxiety, Mood, Cognitive Impairment
Interventions
Not listed
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
18 Years to 89 Years
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 12, 2024 · Synced Oct 13, 2026, 6:35 PM EDT
Completed Phase 4 Interventional Results available

Maintain Respiratory Muscle Function and Reduce Pneumonia Risk in Cancer Patients

NCT03469271
View directory record Official record
Conditions
Cancer
Interventions
1,25 (OH)2 D3, Inspiratory isometric resistance training, Oral Placebo, Sham Inspiratory Isometric Resistance Training, Threshold Inspiratory Muscle Trainer (IMT)
Drug · Other · Device
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
63 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 26, 2023 · Synced Oct 13, 2026, 6:35 PM EDT
Not listed Not applicable Interventional

Heated High Flow Oxygen Use in Infants With Bronchiolitis and Hypoxia

NCT01662544
View directory record Official record
Conditions
Bronchiolitis, Hypoxia
Interventions
Oxygen delivery
Procedure
Lead sponsor
Children's Hospitals and Clinics of Minnesota
Other
Eligibility
3 Months to 18 Months
Enrollment
56 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2017
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jul 19, 2017 · Synced Oct 13, 2026, 6:35 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

COVID-19 Household Transmission Study

NCT04445233
View directory record Official record
Conditions
COVID-19
Interventions
COVID-19 IgM-IgG Rapid Test
Device
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
1 Year and older
Enrollment
315 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 27, 2022 · Synced Oct 13, 2026, 6:35 PM EDT
Completed Phase 1Phase 2 Interventional Results available

A Phase 2a to Evaluate the Safety of MEDI8852 in Adults With Uncomplicated Influenza

NCT02603952
View directory record Official record
Conditions
Influenza
Interventions
Oseltamivir, MEDI8852, Placebo
Drug
Lead sponsor
MedImmune LLC
Industry
Eligibility
18 Years to 65 Years
Enrollment
126 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
22
States / cities
Canoga Park, California • Long Beach, California • Los Angeles, California + 15 more
Source: ClinicalTrials.gov public record
Updated Jun 8, 2018 · Synced Oct 13, 2026, 6:35 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

A Study to Investigate the PK, Safety, and Tolerability of Sotrovimab vs Placebo Administered IV or IM in Japanese and Caucasian Participants

NCT04988152
View directory record Official record
Conditions
Covid19
Interventions
sotrovimab, Placebo to Biologic
Biological · Other
Lead sponsor
Vir Biotechnology, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
2
States / cities
Anaheim, California • Glendale, California
Source: ClinicalTrials.gov public record
Updated Jun 7, 2024 · Synced Oct 13, 2026, 6:35 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Safety of Two Trivalent Influenza Vaccines Evaluated in Children and Adolescents 4 to 17 Years of Age

NCT01857206
View directory record Official record
Conditions
Influenza, Fever
Interventions
Mammalian cell based flu vaccine, Egg based flu vaccine
Biological
Lead sponsor
Novartis Vaccines
Industry
Eligibility
4 Years to 17 Years
Enrollment
2,055 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
18
States / cities
Mobile, Alabama • Ponte Vedra, Florida • Augusta, Kansas + 12 more
Source: ClinicalTrials.gov public record
Updated Dec 5, 2014 · Synced Oct 13, 2026, 6:35 PM EDT
Completed Phase 4 Interventional Results available

Post Operative Sore Throat and Dexamethasone

NCT01052038
View directory record Official record
Conditions
Sore Throat, Pain
Interventions
Placebo administration, Dexamethasone 0.05mg/kr administration, Dexamethasone 0.1mg/kg
Drug
Lead sponsor
Northwestern University
Other
Eligibility
18 Years to 64 Years · Female only
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 2, 2012 · Synced Oct 13, 2026, 6:35 PM EDT
Completed No phase listed Observational

Covid Flu A/B and RSV 4 in 1 Diagnostic Test

NCT07308158
View directory record Official record
Conditions
Influenza A, Influenza B, COVID - 19, RSV
Interventions
Investigational Flu A/B Covid-19 and RSV Diagnostic Test
Diagnostic Test
Lead sponsor
iHealth Labs inc
Industry
Eligibility
6 Months and older
Enrollment
1,119 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
21
States / cities
Birmingham, Alabama • Trussville, Alabama • Dublin, California + 17 more
Source: ClinicalTrials.gov public record
Updated Jan 8, 2026 · Synced Oct 13, 2026, 6:35 PM EDT
Recruiting Phase 2 Interventional

High vs. Standard Dose Influenza Vaccines in Lung Transplant (Repeater)

NCT07192458
View directory record Official record
Conditions
Immunization; Infection|Transplantation Infection|Influenza, Influenza
Interventions
Fluzone High Dose Inactivated Influenza Vaccine, Fluzone Standard Dose Inactivated Influenza Vaccine
Biological
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2029
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 7, 2025 · Synced Oct 13, 2026, 6:35 PM EDT
Withdrawn Not applicable Interventional

Lung Irradiation for COVID-19 Pneumonia

NCT04393948
View directory record Official record
Conditions
SARS-CoV 2
Interventions
Phase 1, Phase 2
Radiation
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
40 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 4, 2022 · Synced Oct 13, 2026, 6:35 PM EDT
Completed Phase 3 Interventional

TBTC Study 22: Efficacy of Once-Weekly Rifapentine and Isoniazid in Treatment of Tuberculosis

NCT00023335
View directory record Official record
Conditions
Pulmonary Tuberculosis
Interventions
Rifapentine, Isoniazid
Drug
Lead sponsor
Centers for Disease Control and Prevention
Federal
Eligibility
18 Years and older
Enrollment
1,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1995 – 2001
U.S. locations
20
States / cities
Little Rock, Arkansas • Los Angeles, California • San Francisco, California + 15 more
Source: ClinicalTrials.gov public record
Updated Sep 5, 2005 · Synced Oct 13, 2026, 6:35 PM EDT
Terminated No phase listed Observational

Compensatory Reserve Index (CRI) for Management of COVID-19

NCT04457817
View directory record Official record
Conditions
COVID
Interventions
CRI
Device
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 70 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Nov 11, 2021 · Synced Oct 13, 2026, 6:35 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

The Efficacy of the 2023-2024 Updated COVID-19 Vaccines Against COVID-19 Infection

NCT06065176
View directory record Official record
Conditions
COVID-19, Vaccine-Preventable Diseases, SARS CoV 2 Infection, Upper Respiratory Tract Infection, Upper Respiratory Disease
Interventions
Novavax COVID-19 vaccine (2023-2024 formula XBB containing), Pfizer COVID-19 mRNA vaccine (2023-2024 formula XBB containing)
Biological
Lead sponsor
Sarang K. Yoon, DO, MOH
Other
Eligibility
18 Years and older
Enrollment
1,188 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jan 28, 2026 · Synced Oct 13, 2026, 6:35 PM EDT