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Showing 1–24 of 155 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Upper Respiratory Tract Infection Clear all
Completed Phase 3 Interventional Accepts healthy volunteers

Spirulina Oral Supplement for Enhancing Host Resilience to Virus Infection

NCT05447078
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Immulina TM, Placebo
Drug · Dietary Supplement
Lead sponsor
University of Mississippi Medical Center
Other
Eligibility
18 Years and older
Enrollment
492 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
1
States / cities
Jackson, Mississippi
Source: ClinicalTrials.gov public record
Updated Dec 25, 2025 · Synced Jul 21, 2026, 11:45 PM EDT
Completed Phase 1 Interventional

Respiratory Syncytial Virus Human Challenge in Healthy Adult Volunteers

NCT02484417
View directory record Official record
Conditions
Upper Respiratory Tract Infection
Interventions
RSV A2
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 50 Years
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 9, 2026 · Synced Jul 21, 2026, 11:45 PM EDT
Terminated Phase 2 Interventional Results available

Effects of JNJ-53718678 in Adult and Adolescent Participants Who Had a Hematopoietic Stem Cell Transplantation and Who Are Infected With Respiratory Syncytial Virus (RSV)

NCT04056611
View directory record Official record
Conditions
Respiratory Syncytial Virus Infections
Interventions
JNJ-53718678 250 mg, Placebo, JNJ-53718678 125 mg
Drug
Lead sponsor
Janssen Sciences Ireland UC
Industry
Eligibility
13 Years to 75 Years
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
9
States / cities
Los Angeles, California • Detroit, Michigan • Minneapolis, Minnesota + 6 more
Source: ClinicalTrials.gov public record
Updated Feb 3, 2025 · Synced Jul 21, 2026, 11:45 PM EDT
Completed Not applicable Interventional Results available

Urgent Care Management of Respiratory Illness Enabled With Novel Testing Pathway

NCT05467007
View directory record Official record
Conditions
Viral Infection, Acute Respiratory Infection, Upper Resp Tract Infection
Interventions
BioFire® Respiratory Panel 2.1-EZ
Diagnostic Test
Lead sponsor
Andrew Meltzer
Other
Eligibility
7 Years and older
Enrollment
360 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
2
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Sep 18, 2024 · Synced Jul 21, 2026, 11:45 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Three Arm Trial of Immune Effects of Echinacea

NCT01129128
View directory record Official record
Conditions
Upper Respiratory Tract Infections
Interventions
Echinacea purpurea product, Placebo
Biological
Lead sponsor
University of Washington
Other
Eligibility
21 Years to 65 Years
Enrollment
67 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Kenmore, Washington
Source: ClinicalTrials.gov public record
Updated Jun 20, 2012 · Synced Jul 21, 2026, 11:45 PM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Shifts in the Respiratory Microbiome and Clinical Outcomes of SARS-CoV-2

NCT04815018
View directory record Official record
Conditions
SARS-CoV-2 Infection, Bacterial Respiratory Tract Infection, Viral Respiratory Tract Infection
Interventions
Not listed
Lead sponsor
Pathnostics
Industry
Eligibility
60 Years and older
Enrollment
185 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
4
States / cities
Delaware, Ohio • Granville, Ohio • Westerville, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 29, 2021 · Synced Jul 21, 2026, 11:45 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Randomized Controlled Trial of Social Network Targeting in Honduras

NCT02694679
View directory record Official record
Conditions
Preterm Delivery, Hypothermia, Diarrhea, Upper Respiratory Infection, Omphalitis
Interventions
CBNH
Behavioral
Lead sponsor
Yale University
Other
Eligibility
12 Years and older
Enrollment
31,195 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2020
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 7, 2023 · Synced Jul 21, 2026, 11:45 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Natural Modulators of Immune Function and Mood

NCT05508529
View directory record Official record
Conditions
Stress
Interventions
Chaga Mushroom, Algae Extract, Black Cumin Seed Oil, Black Cumin Seed Oil + Astaxanthin, Black Cumin Seed Oil + Omega 3, Placebo
Dietary Supplement
Lead sponsor
3 Waves Wellness
Industry
Eligibility
18 Years to 70 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Plymouth, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 18, 2022 · Synced Jul 21, 2026, 11:45 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

A Prospective, Epidemiological Study to Assess the Disease Burden of Respiratory Syncytial Virus Associated, Suspected Lower Respiratory Tract Infections in Newborns, From 0 to 2 Years of Age and Risk of Development of Wheeze and Asthma From 0 to 6 Years of Age

NCT01995175
View directory record Official record
Conditions
Respiratory Syncytial Virus
Interventions
Nasal swab sampling, Blood sampling, Diary cards
Procedure · Other
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
Up to 6 Years
Enrollment
2,409 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2021
U.S. locations
9
States / cities
Oakland, California • Sacramento, California • Santa Clara, California + 5 more
Source: ClinicalTrials.gov public record
Updated Nov 28, 2022 · Synced Jul 21, 2026, 11:45 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

A Clinical Study to Determine if Beta Glucan Reduces the Incidence, Duration or Severity of URTIs Among Skiers

NCT05917015
View directory record Official record
Conditions
Upper Respiratory Tract Infections, Mental Stress
Interventions
Treatment, Placebo
Dietary Supplement · Other
Lead sponsor
USANA Health Sciences
Industry
Eligibility
18 Years to 30 Years
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Park City, Utah
Source: ClinicalTrials.gov public record
Updated Jun 22, 2023 · Synced Jul 21, 2026, 11:45 PM EDT
Not listed No phase listed Observational

Change in Antibody Levels Following SARS-CoV-2 (Covid-19) Vaccinations

NCT04944095
View directory record Official record
Conditions
Covid-19, Subjects Vaccinated Against Covid-19
Interventions
Change in SARS-CoV-2 Antibody Levels
Other
Lead sponsor
Dr. Sidney J. Stohs
Other
Eligibility
55 Years and older
Enrollment
10,000 participants
Timeline
2021 – 2024
U.S. locations
1
States / cities
Southlake, Texas
Source: ClinicalTrials.gov public record
Updated Aug 28, 2022 · Synced Jul 21, 2026, 11:45 PM EDT
Completed Phase 3 Interventional

Placebo and Active Controlled Study to Assess Efficacy and Tolerability of Aspirin Plus Pseudoephedrine

NCT01062360
View directory record Official record
Conditions
Common Cold, Pharyngitis
Interventions
Acetylsalicylic Acid (Aspirin Complex, BAYE4465) + Pseudoephedrine, Acetylsalicylic Acid (Aspirin, BAYE4465), Pseudoephedrine, Placebo
Drug
Lead sponsor
Bayer
Industry
Eligibility
18 Years to 65 Years
Enrollment
1,016 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2007
U.S. locations
2
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 31, 2017 · Synced Jul 21, 2026, 11:45 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Effect of a Medicated Topical Therapy , Petrolatum, and No Treatment on Nocturnal Cough

NCT00743990
View directory record Official record
Conditions
Respiratory Tract Diseases
Interventions
Ointment containing camphor, eucalyptus oil, and menthol, Petroleum jelly
Other
Lead sponsor
Penn State University
Other
Eligibility
2 Years to 11 Years
Enrollment
143 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2010
U.S. locations
1
States / cities
Hershey, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Nov 23, 2017 · Synced Jul 21, 2026, 11:45 PM 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 Jul 21, 2026, 11:45 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

A STUDY OF A RSV VACCINE WHEN GIVEN TOGETHER WITH TDAP IN HEALTHY NONPREGNANT WOMEN AGED BETWEEN 18 TO 49 YEARS

NCT04071158
View directory record Official record
Conditions
Respiratory Tract Infection
Interventions
RSV Vaccine, Tdap, Placebo
Biological
Lead sponsor
Pfizer
Industry
Eligibility
18 Years to 49 Years · Female only
Enrollment
713 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
16
States / cities
Stockbridge, Georgia • Honolulu, Hawaii • Wichita, Kansas + 12 more
Source: ClinicalTrials.gov public record
Updated Feb 14, 2021 · Synced Jul 21, 2026, 11:45 PM EDT
Completed No phase listed Observational

Long Term Patency Following Arterial Repair

NCT02228057
View directory record Official record
Conditions
Upper Extremity Arterial Surgery
Interventions
Not listed
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years and older
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 12, 2015 · Synced Jul 21, 2026, 11:45 PM EDT
Completed No phase listed Observational

A Two Arm, Multi-Centre Clinical Evaluation of the NxTAG Respiratory Pathogen Panel

NCT01787227
View directory record Official record
Conditions
Respiratory Tract Infection, Bronchitis, Bronchiolitis, Pneumonia
Interventions
xTAG RPP
Device
Lead sponsor
Luminex Molecular Diagnostics
Industry
Eligibility
Not listed
Enrollment
1,500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2015
U.S. locations
3
States / cities
St Louis, Missouri • Lake Success, New York • Temple, Texas
Source: ClinicalTrials.gov public record
Updated Mar 2, 2016 · Synced Jul 21, 2026, 11:45 PM EDT
Completed No phase listed Observational

Study to Evaluate the Incidence of Hospitalizations and Respiratory Tract Infections in Premature Infants

NCT00384462
View directory record Official record
Conditions
Respiratory Syncytial Virus Infections
Interventions
Not listed
Lead sponsor
MedImmune LLC
Industry
Eligibility
1 Month to 6 Months
Enrollment
346 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
59
States / cities
Birmingham, Alabama • Benton, Arkansas • Jonesboro, Arkansas + 50 more
Source: ClinicalTrials.gov public record
Updated Feb 3, 2009 · Synced Jul 21, 2026, 11:45 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 27, 2026 · Synced Jul 21, 2026, 11:45 PM EDT
Completed No phase listed Observational

Prospective Clinical Evaluation of the FilmArray Respiratory Panel 2

NCT03012217
View directory record Official record
Conditions
Upper Resp Tract Infection
Interventions
Observational Study
Other
Lead sponsor
BioFire Diagnostics, LLC
Industry
Eligibility
Not listed
Enrollment
1,612 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016
U.S. locations
3
States / cities
Maywood, Illinois • Columbus, Ohio • Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jan 11, 2017 · Synced Jul 21, 2026, 11:45 PM EDT
Recruiting Phase 4 Interventional Accepts healthy volunteers

Characterizing the Human Airway Immune Response to FluMist Vaccination

NCT07177417
View directory record Official record
Conditions
Healthy Young Adults, Influenza Vaccines, Influenza Vaccine Response
Interventions
FluMist, inactivated influenza vaccine, bronchoscopy
Biological · Procedure
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 40 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2028
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Sep 16, 2025 · Synced Jul 21, 2026, 11:45 PM EDT
Completed Phase 1 Interventional

Alleviation of Common Cold Symptoms

NCT06106880
View directory record Official record
Conditions
Common Cold, Pharyngitis, Fever, Congestion, Rhinorrhea, Cough, Sore-throat, Sore Throats Viral, Malaise, Headache, Runny Nose, Sneezing
Interventions
Wintergreen Throat Spray and Aspirin Tablet, Aspirin Throat Spray and Placebo Tablet, Wintergreen Throat Spray and Placebo Tablet, Placebo Throat Spray and Placebo Tablet
Drug · Dietary Supplement · Other
Lead sponsor
Applied Biological Laboratories Inc
Other
Eligibility
18 Years to 65 Years
Enrollment
157 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
6
States / cities
Irvine, California • Washington D.C., District of Columbia • Atlanta, Georgia + 3 more
Source: ClinicalTrials.gov public record
Updated Jan 15, 2024 · Synced Jul 21, 2026, 11:45 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Gas Supply, Demand and Middle Ear Gas Balance: Specific Aim 2

NCT00694421
View directory record Official record
Conditions
Upper Respiratory Infection
Interventions
Not listed
Lead sponsor
Cuneyt M. Alper
Other
Eligibility
2 Years to 54 Years
Enrollment
139 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2012
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Nov 3, 2016 · Synced Jul 21, 2026, 11:45 PM EDT
Not listed No phase listed Observational

A Multi-Site Clinical Evaluation of the ARIES Flu Assay in Symptomatic Patients

NCT02087761
View directory record Official record
Conditions
Respiratory Tract Infection, Bronchitis, Pneumonia
Interventions
Not listed
Lead sponsor
Luminex Corporation
Industry
Eligibility
Not listed
Enrollment
1,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2015
U.S. locations
3
States / cities
St Louis, Missouri • Lake Success, New York • Temple, Texas
Source: ClinicalTrials.gov public record
Updated Mar 1, 2016 · Synced Jul 21, 2026, 11:45 PM EDT