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ClinicalTrials.gov public records Last synced Oct 15, 2026, 5:10 AM EDT

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Showing 577–600 of 3,925 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Respiratory Tract Infections (RTI) Clear all
No Longer Available No phase listed Expanded access

Convalescent Plasma for the Treatment of Patients With COVID-19

NCT04372368
View directory record Official record
Conditions
COVID-19, SARS-CoV 2
Interventions
COVID-19 Convalescent Plasma
Biological
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years and older
U.S. locations
6
States / cities
Aurora, Colorado • Colorado Springs, Colorado • Denver, Colorado + 2 more
Source: ClinicalTrials.gov public record
Updated Aug 28, 2020 · Synced Oct 15, 2026, 5:10 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

The Celljuvant Study: A Phase 3 Immunogenicity and Safety Study of aQIVc Vaccine in Adults Aged 50 Years and Older

NCT06015282
View directory record Official record
Conditions
Influenza, Human
Interventions
Investigational aQIVc, licensed QIVr, licensed aQIV
Biological
Lead sponsor
Seqirus
Industry
Eligibility
50 Years and older
Enrollment
7,741 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
51
States / cities
Tempe, Arizona • Little Rock, Arkansas • Huntington Beach, California + 47 more
Source: ClinicalTrials.gov public record
Updated Apr 27, 2025 · Synced Oct 15, 2026, 5:10 AM EDT
Completed Phase 2 Interventional Results available

Study to Evaluate the Safety and Efficacy of High Dose Intravenous Immune Globulin (IVIG) Plus Standard Medical Treatment (SMT) Versus SMT Alone in Participants in Intensive Care Unit (ICU) With Coronavirus Disease (COVID-19)

NCT04480424
View directory record Official record
Conditions
COVID-19
Interventions
GAMUNEX-C, Standard Medical Treatment
Biological · Drug
Lead sponsor
Grifols Therapeutics LLC
Industry
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
18
States / cities
Chandler, Arizona • Coronado, California • Chicago, Illinois + 15 more
Source: ClinicalTrials.gov public record
Updated Oct 7, 2022 · Synced Oct 15, 2026, 5:10 AM EDT
Withdrawn Phase 2 Interventional

A Study of Amantadine for Cognitive Dysfunction in Patients With Long-Covid

NCT06234462
View directory record Official record
Conditions
Long COVID, Post-Acute COVID-19 Syndrome
Interventions
Amantadine, Physical, Occupational, Speech Therapy, Provider Counseling, Medications for symptoms management
Drug · Other
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
20 Years to 65 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Aug 26, 2025 · Synced Oct 15, 2026, 5:10 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Safety and Immune Response to Recombinant Live-Attenuated Influenza H2N2 Virus Vaccine

NCT00722774
View directory record Official record
Conditions
Influenza, Virus Diseases
Interventions
H2N2 1960 AA ca recombinant vaccine
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 40 Years
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 10, 2008 · Synced Oct 15, 2026, 5:10 AM EDT
Completed Not applicable Interventional

Awake Prone Position in Hypoxemic Patients With Coronavirus Disease 19 COVID-19 (COVI-PRONE)

NCT04350723
View directory record Official record
Conditions
Corona Virus Infection, Covid19, COVID-19
Interventions
Awake Proning
Procedure
Lead sponsor
St. Joseph's Healthcare Hamilton
Other
Eligibility
18 Years and older
Enrollment
400 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Oct 15, 2021 · Synced Oct 15, 2026, 5:10 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Single Group Study of the Safety of and Immune Response to a Bird Flu Virus Vaccine (H5N1) in Healthy Adults

NCT00488046
View directory record Official record
Conditions
Influenza, Virus Diseases
Interventions
H5N1 (6-2) AA ca Recombinant (A/Hong Kong/213/2003 x A/AnnArbor/6/60 ca)
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 49 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 20, 2007 · Synced Oct 15, 2026, 5:10 AM EDT
Withdrawn Phase 2Phase 3 Interventional

Efficacy and Safety of Grass-SPIRE Registration Study

NCT02795273
View directory record Official record
Conditions
Rhinitis, Conjunctivitis
Interventions
Grass-SPIRE, Placebo
Drug
Lead sponsor
Circassia Limited
Industry
Eligibility
12 Years to 75 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2016
U.S. locations
2
States / cities
Canton, Ohio • Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 23, 2016 · Synced Oct 15, 2026, 5:10 AM EDT
Completed Phase 1 Interventional

Phase I Safety and Pharmacokinetics Study of Microparticulate Atovaquone (m-Atovaquone; 566C80) in HIV-Infected and Perinatally Exposed Infants and Children

NCT00000773
View directory record Official record
Conditions
Pneumonia, Pneumocystis Carinii, HIV Infections
Interventions
Atovaquone
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
1 Month to 12 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Ends 1996
U.S. locations
5
States / cities
San Francisco, California • Chicago, Illinois • New Orleans, Louisiana + 2 more
Source: ClinicalTrials.gov public record
Updated Oct 28, 2021 · Synced Oct 15, 2026, 5:10 AM EDT
Completed Phase 2 Interventional

Subcutaneous Amifostine (Ethyol®) in the Prevention of Radiochemotherapy-Induced Esophagitis and Pneumonitis in Patients With Unresectable Non-Small Cell Lung Cancer

NCT00081315
View directory record Official record
Conditions
Esophagitis, Pneumonitis, Non-Small Cell Lung Carcinoma
Interventions
Amifostine
Drug
Lead sponsor
MedImmune LLC
Industry
Eligibility
18 Years and older
Enrollment
130 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2006
U.S. locations
24
States / cities
Los Angeles, California • Sacramento, California • Torrington, Connecticut + 21 more
Source: ClinicalTrials.gov public record
Updated Aug 21, 2007 · Synced Oct 15, 2026, 5:10 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Influenza Vaccine Revaccination in Ambulatory Elderly Subjects

NCT00775450
View directory record Official record
Conditions
Influenza, Orthomyxovirus Infection, Myxovirus Infection
Interventions
Influenza Virus Vaccine USP Trivalent Types A and B
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
65 Years and older
Enrollment
807 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
28
States / cities
Hoover, Alabama • Mobile, Alabama • Chandler, Arizona + 24 more
Source: ClinicalTrials.gov public record
Updated Dec 31, 2013 · Synced Oct 15, 2026, 5:10 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Strengthening Intentions

NCT07222774
View directory record Official record
Conditions
Influenza Vaccination, Behavior And Behavior Mechanism
Interventions
Experimental
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
Not listed
Enrollment
350 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 30, 2025 · Synced Oct 15, 2026, 5:10 AM EDT
Completed Not applicable Interventional Results available

COVID-19 Vaccinations With a Sweepstakes

NCT04951310
View directory record Official record
Conditions
Covid19
Interventions
Philly Vax Sweepstakes
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
3,827,656 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 3, 2025 · Synced Oct 15, 2026, 5:10 AM EDT
Completed Not applicable Interventional

Outcomes of Patients Not Responding to Antibiotics in the Community

NCT00245427
View directory record Official record
Conditions
Sinusitis, Bronchitis, Chronic, Pneumonia, Bacterial
Interventions
all macrolide antibiotics, all beta-lactam antibiotics
Drug
Lead sponsor
CPL Associates
Other
Eligibility
Up to 95 Years
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2006
U.S. locations
1
States / cities
Spokane, Washington
Source: ClinicalTrials.gov public record
Updated Oct 31, 2007 · Synced Oct 15, 2026, 5:10 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Assessing Testing Strategies for Safe Return to K-12 Schools in an Underserved Population

NCT04875520
View directory record Official record
Conditions
Covid19
Interventions
Screening testing strategy, No screening testing strategy
Other
Lead sponsor
Washington University School of Medicine
Other
Eligibility
0 Years and older
Enrollment
1,390 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
5
States / cities
Hazelwood, Missouri • Jennings, Missouri • Saint Ann, Missouri + 2 more
Source: ClinicalTrials.gov public record
Updated Jun 29, 2026 · Synced Oct 15, 2026, 5:10 AM EDT
Completed Phase 3 Interventional Results available

Safety, PK and Effectiveness of IV Peramivir Versus Oseltamivir in Pediatric Subjects With Uncomplicated Influenza

NCT02369159
View directory record Official record
Conditions
Influenza
Interventions
Peramivir, Oseltamivir
Drug
Lead sponsor
BioCryst Pharmaceuticals
Industry
Eligibility
0 Days to 17 Years
Enrollment
137 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2020
U.S. locations
9
States / cities
Shreveport, Louisiana • Dayton, Ohio • Smithfield, Pennsylvania + 6 more
Source: ClinicalTrials.gov public record
Updated Mar 23, 2021 · Synced Oct 15, 2026, 5:10 AM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Apple Respiratory Study

NCT04912180
View directory record Official record
Conditions
Acute Respiratory Infection, Coronavirus Infection, Influenza
Interventions
Not listed
Lead sponsor
Apple Inc.
Industry
Eligibility
22 Years and older
Enrollment
108 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jul 14, 2021 · Synced Oct 15, 2026, 5:10 AM EDT
Completed Phase 3 Interventional Results available

Efficacy, Safety, and Tolerability of Aclidinium Bromide in the Treatment of Moderate-to-severe Chronic Obstructive Pulmonary Disease (COPD) (LAS-MD-38)

NCT01045161
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease
Interventions
Aclidinium bromide, Placebo
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
40 Years and older
Enrollment
544 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
110
States / cities
Birmingham, Alabama • Muscle Shoals, Alabama • Pell City, Alabama + 94 more
Source: ClinicalTrials.gov public record
Updated Jan 23, 2017 · Synced Oct 15, 2026, 5:10 AM EDT
Not listed Phase 3 Interventional Accepts healthy volunteers

A Phase 3 Randomized Double Blind Efficacy and Safety Study of Oral Polio Vaccine and NA-831 for Covid-19

NCT04540185
View directory record Official record
Conditions
Covid19, SARS (Severe Acute Respiratory Syndrome), SARS-CoV Infection, SARS-CoV-2
Interventions
Biological: oral polio vaccine, Comparable Placebo, NA-831, Comparable Placebo of drug, Combination of oral polio vaccine and NA-831, Comparable Placebo of Oral Polio Vaccine and Placebo of drug
Biological · Drug · Combination Product
Lead sponsor
Biomed Industries, Inc.
Industry
Eligibility
18 Years and older
Enrollment
3,600 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
8
States / cities
Los Angeles, California • Orange, California • Palo Alto, California + 4 more
Source: ClinicalTrials.gov public record
Updated Sep 9, 2020 · Synced Oct 15, 2026, 5:10 AM EDT
Terminated Phase 1Phase 2 Interventional Results available

Colchicine for the Treatment of Cardiac Injury in Hospitalized Patients With COVID-19 (COLHEART-19)

NCT04762771
View directory record Official record
Conditions
Covid19
Interventions
Colchicine
Drug
Lead sponsor
Baptist Health South Florida
Other
Eligibility
18 Years to 99 Years
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Jul 25, 2022 · Synced Oct 15, 2026, 5:10 AM EDT
Completed Phase 3 Interventional

Use of Ceftaroline in Hospitalized Patients With Community Acquired Pneumonia

NCT01605864
View directory record Official record
Conditions
Community Acquired Bacterial Pneumonia
Interventions
Efficacy of ceftaroline
Drug
Lead sponsor
Albany Medical College
Other
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
Albany, New York
Source: ClinicalTrials.gov public record
Updated Mar 24, 2014 · Synced Oct 15, 2026, 5:10 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Mitigating Mental and Social Health Outcomes of COVID-19: a Counseling Approach

NCT06142292
View directory record Official record
Conditions
Social Determinants of Health, Mental Health Issue, COVID-19
Interventions
Individual counseling, Group counseling
Behavioral
Lead sponsor
Idaho State University
Other
Eligibility
18 Years and older
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Meridian, Idaho
Source: ClinicalTrials.gov public record
Updated Feb 25, 2025 · Synced Oct 15, 2026, 5:10 AM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Quantification of Binding and Neutralizing Antibody Levels in COVID-19 Vaccinated Health Care Workers Over 1 Year

NCT04910971
View directory record Official record
Conditions
COVID-19 Vaccine, Corona Virus Infection, Vaccine Adverse Reaction, Vaccine Response, Inflammation, Thrombosis
Interventions
Not listed
Lead sponsor
LifeBridge Health
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 2, 2021 · Synced Oct 15, 2026, 5:10 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Advance Care Planning: Communicating With Outpatients for Vital Informed Decision

NCT04660422
View directory record Official record
Conditions
Advanced Care Planning, Shared Decision Making, Video Decision Aids, Communication Skills, Advance Directives, Natural Language Processing, Covid19
Interventions
VitalTalk communication skills training, ACP Decisions Video Program, Intervention training:, Medical Record Review
Other
Lead sponsor
Dana-Farber Cancer Institute
Other
Eligibility
65 Years and older
Enrollment
42,019 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
New Hyde Park, New York
Source: ClinicalTrials.gov public record
Updated Jul 5, 2022 · Synced Oct 15, 2026, 5:10 AM EDT