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ClinicalTrials.gov public records Last synced Oct 13, 2026, 8:59 AM EDT

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Showing 193–216 of 931 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Orthomyxoviridae Infection Clear all
Completed Phase 2 Interventional Accepts healthy volunteers Results available

A Clinical Trial of CSL's 2009 H1N1 Influenza Vaccine (CSL425) in a Healthy Pediatric Population in the USA

NCT00958243
View directory record Official record
Conditions
Influenza
Interventions
CSL's 2009 H1N1 Influenza Vaccine (CSL425), Placebo
Biological
Lead sponsor
Seqirus
Industry
Eligibility
6 Months to 9 Years
Enrollment
473 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
13
States / cities
Chandler, Arizona • Melbourne, Florida • Bardstown, Kentucky + 10 more
Source: ClinicalTrials.gov public record
Updated May 23, 2018 · Synced Oct 13, 2026, 8:59 AM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers

A/Texas Flu Challenge

NCT06753474
View directory record Official record
Conditions
Influenza
Interventions
Influenza Virus influenza A H3N2 strain
Biological
Lead sponsor
Emory University
Other
Eligibility
18 Years to 49 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
2
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Mar 3, 2026 · Synced Oct 13, 2026, 8:59 AM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers Results available

Pediatric Safety and Immunogenicity Study of Cell-Culture Derived and Egg-based Subunit Influenza Vaccines in Healthy Children and Adolescents

NCT00645411
View directory record Official record
Conditions
Influenza
Interventions
Cell culture-derived influenza subunit vaccine (cTIV), Egg derived influenza subunit vaccine (eTIV)
Biological
Lead sponsor
Novartis
Industry
Eligibility
3 Years to 17 Years
Enrollment
3,604 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
16
States / cities
Fayetteville, Arkansas • Downey, California • Bardstown, Kentucky + 12 more
Source: ClinicalTrials.gov public record
Updated Nov 23, 2015 · Synced Oct 13, 2026, 8:59 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Flu Shot Pre-visit Questionnaire

NCT05508698
View directory record Official record
Conditions
Influenza
Interventions
Precommitment Nudge, Salience
Behavioral
Lead sponsor
Geisinger Clinic
Other
Eligibility
18 Years and older
Enrollment
230,962 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Danville, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 25, 2023 · Synced Oct 13, 2026, 8:59 AM EDT
Completed No phase listed Observational

Respiratory Virus Hospitalization Study (FLU 003 Plus)

NCT01056185
View directory record Official record
Conditions
Influenza, Novel Respiratory Virus-1 Middle Eastern Respiratory Syndrome Coronavirus (MERS-CoV), Novel Respiratory Virus-2 Severe Acute Respiratory Syndrome Coronavirus (SARS-CoV)
Interventions
Not listed
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years and older
Enrollment
1,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2024
U.S. locations
18
States / cities
San Diego, California • Washington D.C., District of Columbia • Chicago, Illinois + 14 more
Source: ClinicalTrials.gov public record
Updated Oct 21, 2024 · Synced Oct 13, 2026, 8:59 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Sanofi Pasteur Quadrivalent Intradermal Influenza Vaccine Pregnancy Registry

NCT02554409
View directory record Official record
Conditions
Pregnancy, Influenza
Interventions
Quadrivalent Intradermal Influenza Vaccine (QIV)
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
18 Years and older · Female only
Enrollment
87 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2019
U.S. locations
5
States / cities
San Diego, California • Miami, Florida • Albany, New York + 2 more
Source: ClinicalTrials.gov public record
Updated Feb 12, 2020 · Synced Oct 13, 2026, 8:59 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Longitudinal At Home Smell Testing to Detect Infection by SARS-CoV-2

NCT05040659
View directory record Official record
Conditions
Anosmia, Asymptomatic COVID-19, COVID-19 Respiratory Infection, Influenza, Healthy, PASC Post Acute Sequelae of COVID 19
Interventions
AROMHA Longitudinal Smell Test
Device
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 100 Years
Enrollment
1,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 6, 2026 · Synced Oct 13, 2026, 8:59 AM EDT
Completed Phase 4 Interventional Results available

Improving Immunogenicity of Influenza Vaccine in HIV Infected Individuals

NCT01262846
View directory record Official record
Conditions
HIV Infection
Interventions
Fluzone®
Biological
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
195 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 13, 2017 · Synced Oct 13, 2026, 8:59 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Safety and Immunogenicity of MF59C.1 Adjuvanted Trivalent Subunit Influenza Vaccine in Elderly Subjects

NCT01162122
View directory record Official record
Conditions
Influenza
Interventions
MF59 adjuvanted trivalent subunit influenza vaccine (aTIV), Non-adjuvanted trivalent subunit influenza vaccine (TIV)
Biological
Lead sponsor
Novartis Vaccines
Industry
Eligibility
65 Years and older
Enrollment
7,109 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
21
States / cities
Phoenix, Arizona • DeLand, Florida • Jacksonville, Florida + 15 more
Source: ClinicalTrials.gov public record
Updated Jun 26, 2014 · Synced Oct 13, 2026, 8:59 AM EDT
Completed Not applicable Interventional

Electronic Health Records for Health Promotion

NCT00142077
View directory record Official record
Conditions
Influenza
Interventions
Electronic health record and messaging system
Device
Lead sponsor
Boston Children's Hospital
Other
Eligibility
18 Years and older
Enrollment
700 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2006
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 5, 2007 · Synced Oct 13, 2026, 8:59 AM EDT
Completed Phase 2 Interventional Results available

Safety of and Immune Response to an H1N1 Influenza Virus Vaccine in HIV Infected Children and Youth

NCT00992836
View directory record Official record
Conditions
HIV Infections, H1N1 Influenza Virus
Interventions
Influenza A (H1N1) 2009 monovalent vaccine
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
4 Years to 25 Years
Enrollment
155 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
35
States / cities
Birmingham, Alabama • Alhambra, California • La Jolla, California + 25 more
Source: ClinicalTrials.gov public record
Updated Nov 5, 2021 · Synced Oct 13, 2026, 8:59 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

VRC 309: A Multi-Center, Open-Label, Randomized Phase I Study of an Investigational Influenza DNA Vaccine Followed by 2009/2010 Seasonal Influenza Trivalent Inactivated Vaccine (TIV) Compared to Two Injections of TIV in Adults 45-70 Years

NCT00995982
View directory record Official record
Conditions
Influenza, Human
Interventions
VRC-FLUDNA056-00VP
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
45 Years to 70 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
2
States / cities
Bethesda, Maryland • Annandale, Virginia
Source: ClinicalTrials.gov public record
Updated Jul 2, 2017 · Synced Oct 13, 2026, 8:59 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

A Study of mRNA-1083 (SARS-CoV-2 and Influenza) Vaccine in Healthy Adult Participants, ≥50 Years of Age

NCT06097273
View directory record Official record
Conditions
SARS-CoV-2, Influenza
Interventions
mRNA-1083, Placebo, Influenza Vaccine, COVID-19 Vaccine
Biological
Lead sponsor
ModernaTX, Inc.
Industry
Eligibility
50 Years and older
Enrollment
8,061 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
146
States / cities
Anniston, Alabama • Birmingham, Alabama • Cullman, Alabama + 122 more
Source: ClinicalTrials.gov public record
Updated Jul 1, 2025 · Synced Oct 13, 2026, 8:59 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Study of Immune Responses in Healthy Adults Receiving Live Influenza Virus Vaccines

NCT01674205
View directory record Official record
Conditions
Influenza, Human
Interventions
A/swine/Missouri/4296424/2006 (H2N3) x A/Ann Arbor/6/60 ca (H2N3 MO 2006/AA ca), A/chicken/Hong Kong/G9/97 (H9N2) x A/Ann Arbor/6/60 ca (H9N2 G9/AA ca), 2012-2013 trivalent seasonal live attenuated influenza vaccine (FluMist®), Vaccine placebo (Leibovitz-15 [L-15]), Vaccine placebo (FluMist®)
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 42 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Dec 15, 2015 · Synced Oct 13, 2026, 8:59 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Safety and Immunogenicity of Two Doses of H5N1 Influenza Vaccine in Children

NCT01776554
View directory record Official record
Conditions
Pandemic H5N1 Influenza
Interventions
Adjuvanted H5N1 pandemic influenza vaccine
Biological
Lead sponsor
Novartis Vaccines
Industry
Eligibility
6 Months to 17 Years
Enrollment
662 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
10
States / cities
Miami, Florida • Newton, Kansas • Wichita, Kansas + 6 more
Source: ClinicalTrials.gov public record
Updated Jan 16, 2019 · Synced Oct 13, 2026, 8:59 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Study of Fluzone® Quadrivalent, Fluzone® Intradermal Quadrivalent, and Fluzone® High-Dose, Influenza Vaccines in Adults

NCT02563093
View directory record Official record
Conditions
Influenza
Interventions
Fluzone Quadrivalent vaccine, 2015-2016 formulation, No Preservative, Fluzone Intradermal Quadrivalent vaccine, 2015-2016 formulation, Fluzone High-Dose vaccine, 2015-2016 formulation
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
18 Years and older
Enrollment
208 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
4
States / cities
Santa Rosa, California • Council Bluffs, Iowa • Metairie, Louisiana + 1 more
Source: ClinicalTrials.gov public record
Updated Dec 12, 2016 · Synced Oct 13, 2026, 8:59 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Building Engagement Using Financial Incentives Trial - Colorectal Cancer Screening

NCT06124131
View directory record Official record
Conditions
Health Behavior, Colorectal Cancer, Influenza, COVID-19, Vaccine Hesitancy, Vaccine-Preventable Diseases, Healthcare Patient Acceptance
Interventions
Financial incentive for colorectal cancer screening, Financial incentive for flu shot, Financial incentive for COVID-19 shot
Behavioral
Lead sponsor
Tulane University
Other
Eligibility
45 Years to 75 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
New Orleans, Louisiana
Source: ClinicalTrials.gov public record
Updated May 4, 2025 · Synced Oct 13, 2026, 8:59 AM EDT
Completed Phase 4 Interventional Results available

INfluenza Vaccine to Effectively Stop Cardio Thoracic Events and Decompensated Heart Failure

NCT02787044
View directory record Official record
Conditions
Heart Failure, Myocardial Infarction
Interventions
High Dose Trivalent Influenza Vaccine, Standard Dose Quadrivalent Influenza Vaccine
Biological
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years and older
Enrollment
5,388 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2020
U.S. locations
127
States / cities
Birmingham, Alabama • Huntsville, Alabama • Anchorage, Alaska + 93 more
Source: ClinicalTrials.gov public record
Updated Jan 21, 2022 · Synced Oct 13, 2026, 8:59 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Protective Efficacy of Flublok® Quadrivalent Versus Licensed Inactivated Influenza Vaccine in Adults ≥50 Years of Age

NCT02285998
View directory record Official record
Conditions
Influenza
Interventions
Flublok Quadrivalent Influenza Vaccine, Inactivated Influenza Vaccine
Biological
Lead sponsor
Protein Sciences Corporation
Industry
Eligibility
50 Years and older
Enrollment
9,003 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
38
States / cities
Mobile, Alabama • Tempe, Arizona • Little Rock, Arkansas + 34 more
Source: ClinicalTrials.gov public record
Updated Oct 27, 2017 · Synced Oct 13, 2026, 8:59 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

A Safety and Immunogenicity Trial in Adults 65 Years of Age or Over to Prevent Influenza

NCT00706732
View directory record Official record
Conditions
Influenza
Interventions
AVX502, Placebo
Biological
Lead sponsor
AlphaVax, Inc.
Industry
Eligibility
65 Years and older
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
1
States / cities
Lenexa, Kansas
Source: ClinicalTrials.gov public record
Updated Jul 12, 2012 · Synced Oct 13, 2026, 8:59 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

Study of a Combination Vaccine Comprised of Different Recombinant Spike Antigen Levels of a Matrix-M Adjuvanted Recombinant COVID-19 Vaccine and Recombinant Influenza Vaccine in Adult Participants 50 Years of Age and Older

NCT06695130
View directory record Official record
Conditions
COVID-19 Immunization, Influenza Immunization
Interventions
RIV (recombinant influenza vaccine), rC19 (dose 1), RIV + rC19 (dose 1), RIV + rC19 (dose 2), RIV + rC19 (dose 3), RIV + rC19 (dose 4), Placebo (0.9% NaCl)
Biological · Other
Lead sponsor
Sanofi
Industry
Eligibility
50 Years and older
Enrollment
980 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
12
States / cities
Phoenix, Arizona • Cerritos, California • Vista, California + 9 more
Source: ClinicalTrials.gov public record
Updated May 5, 2026 · Synced Oct 13, 2026, 8:59 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 25, 2026 · Synced Oct 13, 2026, 8:59 AM EDT
Completed Not applicable Interventional Results available

A Digital Flu Intervention for People With Cardiovascular Conditions

NCT04584645
View directory record Official record
Conditions
Cardiovascular Diseases, Atrial Fibrillation, Abnormal Heart Rhythms, Cardiac Arrest, Heart Attack, Myocardial Infarction, Coronary Heart Disease, Heart Failure, Stroke, Cerebrovascular Accident
Interventions
Targeted digital intervention
Other
Lead sponsor
Evidation Health
Industry
Eligibility
18 Years and older
Enrollment
49,138 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
San Mateo, California
Source: ClinicalTrials.gov public record
Updated Jun 21, 2022 · Synced Oct 13, 2026, 8:59 AM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

Flublok v. Standard Dose Vaccine Effectiveness Among Kaiser Permanente Northern California Adults 18-64 Years

NCT03694392
View directory record Official record
Conditions
Influenza, Pneumonia, Lower Respiratory Tract Infection, Acute Myocardial Infarction, Congestive Heart Failure, Stroke
Interventions
Flublok Quadrivalent, Standard Dose Inactivated Influenza Vaccine (SD-IIV)
Biological
Lead sponsor
Kaiser Permanente
Other
Eligibility
18 Years to 64 Years
Enrollment
2,776,278 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2022
U.S. locations
1
States / cities
Oakland, California
Source: ClinicalTrials.gov public record
Updated Apr 8, 2025 · Synced Oct 13, 2026, 8:59 AM EDT