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Showing 1–24 of 1,134 matching trials from the live ClinicalTrials.gov search.
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Completed No phase listed Observational

A Pilot Study of Influenza Viruses Isolated From Immunocompromised Children and Adolescents

NCT02352389
View directory record Official record
Conditions
Influenza, Human
Interventions
Blood sample, Nasal swab, Oropharyngeal swab, Stool sample, Symptom checklist
Other
Lead sponsor
St. Jude Children's Research Hospital
Other
Eligibility
Up to 21 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2022
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Dec 11, 2023 · Synced Sep 16, 2026, 3:12 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Cigarette Smoke and Susceptibility to Influenza Infection

NCT00448617
View directory record Official record
Conditions
Healthy
Interventions
Not listed
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 35 Years
Enrollment
138 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2011
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated May 28, 2015 · Synced Sep 16, 2026, 3:12 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Study of the Safety and Immunogenicity of NasoVAX Extension

NCT03760549
View directory record Official record
Conditions
Influenza
Interventions
Subjects were administered NasoVAX high dose
Drug
Lead sponsor
Altimmune, Inc.
Industry
Eligibility
18 Years to 50 Years
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
1
States / cities
Rockville, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 18, 2025 · Synced Sep 16, 2026, 3:12 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Comparison of Inactivated and Live, Attenuated Influenza Vaccine in Children 5-9 Years of Age-Year 3 Amendment

NCT00138385
View directory record Official record
Conditions
Influenza
Interventions
FluMist, Fluzone
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
5 Years to 9 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2007
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Aug 26, 2010 · Synced Sep 16, 2026, 3:12 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Safety and Immunogenicity of VAX125 Influenza Vaccine in Community-living Adults >= 65 Years of Age

NCT00966238
View directory record Official record
Conditions
Influenza
Interventions
VAX125
Biological
Lead sponsor
VaxInnate Corporation
Industry
Eligibility
65 Years and older
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
3
States / cities
Lanexa, Kansas • Rochester, New York • Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Oct 1, 2014 · Synced Sep 16, 2026, 3:12 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Atopic Dermatitis Research Network (ADRN) Influenza Vaccine Study

NCT01737710
View directory record Official record
Conditions
Dermatitis, Atopic
Interventions
Fluzone® Intradermal Vaccine, Fluzone® (Intramuscular) vaccine
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 64 Years · Female only
Enrollment
368 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
5
States / cities
Denver, Colorado • Chicago, Illinois • Boston, Massachusetts + 2 more
Source: ClinicalTrials.gov public record
Updated Mar 28, 2017 · Synced Sep 16, 2026, 3:12 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Simultaneous mRNA COVID-19 and IIV4 Vaccination Study

NCT05028361
View directory record Official record
Conditions
Quality of Life, Injection Site Reaction, Adverse Drug Event, Systemic Reaction
Interventions
mRNA COVID-19, IIV4, Placebo (saline)
Biological · Other
Lead sponsor
Duke University
Other
Eligibility
5 Years and older
Enrollment
348 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
3
States / cities
Baltimore, Maryland • Durham, North Carolina • Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 18, 2024 · Synced Sep 16, 2026, 3:12 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

A Study About Modified RNA Vaccines Against Influenza in Healthy Adults

NCT06436703
View directory record Official record
Conditions
Influenza, Human
Interventions
Influenza ModRNA Vaccine, Quadrivalent Influenza Vaccine (QIV)
Biological
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older
Enrollment
1,202 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
32
States / cities
Mobile, Alabama • Scottsdale, Arizona • Anaheim, California + 25 more
Source: ClinicalTrials.gov public record
Updated Jun 11, 2026 · Synced Sep 16, 2026, 3:12 AM EDT
Completed Phase 1 Interventional

Standard Dose Versus High-Dose Inactivated Flu Vaccine in Pediatric Solid Organ Transplant Patients

NCT01525004
View directory record Official record
Conditions
Pediatric Solid Organ Transplant Patients
Interventions
High-Dose trivalent inactivated influenza vaccine, Standard dose trivalent inactivated influenza vaccine
Drug
Lead sponsor
Vanderbilt University
Other
Eligibility
3 Years to 17 Years
Enrollment
38 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Aug 15, 2016 · Synced Sep 16, 2026, 3:12 AM EDT
Enrolling by invitation Not applicable Interventional Accepts healthy volunteers

SAVE: School Ambassadors for Vaccine Education

NCT07164144
View directory record Official record
Conditions
Influenza Vaccination
Interventions
Vaccine Communication Training
Behavioral
Lead sponsor
University of Rochester
Other
Eligibility
5 Years to 21 Years
Enrollment
6,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Aug 24, 2026 · Synced Sep 16, 2026, 3:12 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

A Study to Evaluate the Safety of 3 New 6:2 Influenza Virus Reassortants in Adults

NCT01579916
View directory record Official record
Conditions
Influenza
Interventions
Trivalent Influenza Virus Vaccine, Placebo
Biological · Other
Lead sponsor
MedImmune LLC
Industry
Eligibility
18 Years to 49 Years
Enrollment
303 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012
U.S. locations
3
States / cities
Miami, Florida • Stockbridge, Georgia • Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Feb 2, 2014 · Synced Sep 16, 2026, 3:12 AM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Acute Respiratory Infection Consortium

NCT01021098
View directory record Official record
Conditions
Influenza
Interventions
Not listed
Lead sponsor
Henry M. Jackson Foundation for the Advancement of Military Medicine
Other
Eligibility
17 Years to 55 Years
Enrollment
2,018 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2023
U.S. locations
5
States / cities
San Diego, California • Bethesda, Maryland • San Antonio, Texas + 2 more
Source: ClinicalTrials.gov public record
Updated Nov 23, 2023 · Synced Sep 16, 2026, 3:12 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

Immunogenicity, Safety and Tolerability of CSL Limited Inactivated Influenza Vaccine in Adults

NCT00333398
View directory record Official record
Conditions
Influenza
Interventions
CSL Trivalent Inactivated Influenza Vaccine - Thimerosal-free, CSL Trivalent Inactivated Influenza Vaccine with Thimerosal, Placebo with Thimerosal
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 64 Years
Enrollment
1,359 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006
U.S. locations
10
States / cities
Stanford, California • Iowa City, Iowa • Baltimore, Maryland + 7 more
Source: ClinicalTrials.gov public record
Updated Aug 26, 2010 · Synced Sep 16, 2026, 3:12 AM EDT
Completed Not applicable Interventional

Fever and Wheezing Events in Children After US Influenza Vaccines Using Text Messaging

NCT02295007
View directory record Official record
Conditions
Fever, Wheezing
Interventions
text message
Behavioral
Lead sponsor
Columbia University
Other
Eligibility
2 Years to 11 Years
Enrollment
266 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
3
States / cities
Atlanta, Georgia • Boston, Massachusetts • New York, New York
Source: ClinicalTrials.gov public record
Updated May 11, 2016 · Synced Sep 16, 2026, 3:12 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Comparative Tests of Flu Vaccination Phone Messages

NCT03332992
View directory record Official record
Conditions
Influenza, Human
Interventions
Viral changes, Protect others, General intentions, Behavioral intentions, Accountability
Behavioral
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
7,206 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 14, 2018 · Synced Sep 16, 2026, 3:12 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

H5 Adult - Chiron Study of Bird Flu Vaccine

NCT00280033
View directory record Official record
Conditions
Influenza
Interventions
Aluminum hydroxide, Inactivated Influenza A/H5N1 Vaccine (Chiron), MF-59, Placebo
Biological · Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 64 Years
Enrollment
394 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006
U.S. locations
4
States / cities
Stanford, California • St Louis, Missouri • Cincinnati, Ohio + 1 more
Source: ClinicalTrials.gov public record
Updated Sep 12, 2013 · Synced Sep 16, 2026, 3:12 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

A Study of Fluzone® High-Dose Vaccine Compared With Fluzone® Vaccine In Elderly Adults

NCT01427309
View directory record Official record
Conditions
Influenza
Interventions
High Dose Trivalent Inactivated Influenza Vaccine, Trivalent Inactivated Influenza Vaccine
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
65 Years and older
Enrollment
31,989 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2013
U.S. locations
105
States / cities
Mobile, Alabama • Chandler, Arizona • Glendale, Arizona + 88 more
Source: ClinicalTrials.gov public record
Updated Apr 19, 2015 · Synced Sep 16, 2026, 3:12 AM EDT
Completed Phase 1 Interventional

Safety Study of Avian Flu Vaccine

NCT00408109
View directory record Official record
Conditions
Influenza A Virus, H5N1 Subtype, Influenza A Virus, Influenzavirus A, Orthomyxoviridae, H5N1 Virus
Interventions
VRC-AVIDNA036-00-VP
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 60 Years
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Sep 16, 2026, 3:12 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

A Study to Determine the Immunogenicity and Safety Profile of CSL Limited's Influenza Virus Vaccine Compared to a US Licensed Comparator Influenza Virus Vaccine in a Pediatric Population

NCT00959049
View directory record Official record
Conditions
Influenza
Interventions
CSL's Influenza Virus Vaccine (Afluria), Influenza Virus Vaccine (Fluzone)
Biological
Lead sponsor
Seqirus
Industry
Eligibility
6 Months to 17 Years
Enrollment
1,474 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
23
States / cities
Chandler, Arizona • Harrisburg, Arkansas • Jonesboro, Arkansas + 16 more
Source: ClinicalTrials.gov public record
Updated May 15, 2017 · Synced Sep 16, 2026, 3:12 AM EDT
Completed Phase 1 Interventional

Study of High-dose Influenza Vaccine Efficacy by Repeated Dosing In Gammopathy Patients

NCT02267733
View directory record Official record
Conditions
Influenza, Gammopathy
Interventions
Fluzone
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years and older
Enrollment
51 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 24, 2016 · Synced Sep 16, 2026, 3:12 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Audio Data Collection for Identification and Classification of Coughing

NCT04326309
View directory record Official record
Conditions
COVID-19, Coronavirus Infections, Hay Fever, Asthma, Chronic Obstructive Pulmonary Disease, Influenza, Common Cold, Respiratory Tract Infections, Healthy
Interventions
Not listed
Lead sponsor
HealthMode Inc.
Industry
Eligibility
18 Years and older
Enrollment
336 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Apr 28, 2022 · Synced Sep 16, 2026, 3:12 AM 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 11, 2025 · Synced Sep 16, 2026, 3:12 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Study of Safety and Immunogenicity of Fluzone® in Healthy Children

NCT00831675
View directory record Official record
Conditions
Influenza
Interventions
Influenza Vaccine 2004-2005 Paediatric Formulation
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
6 Months to 35 Months
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2006
U.S. locations
1
States / cities
Norfolk, Virginia
Source: ClinicalTrials.gov public record
Updated Apr 13, 2016 · Synced Sep 16, 2026, 3:12 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Safety and Immunogenicity of a Live Attenuated H7N9 Influenza Virus Vaccine in Healthy Adults

NCT01995695
View directory record Official record
Conditions
Influenza A Virus, H7N9 Subtype
Interventions
Live attenuated H7N9 A/Anhui/13 ca influenza virus vaccine, Inactivated subvirion H7N9 influenza vaccine
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 49 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2013
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Jul 26, 2016 · Synced Sep 16, 2026, 3:12 AM EDT