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ClinicalTrials.gov public records Last synced Oct 15, 2026, 4:07 PM EDT

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Showing 697–720 of 1,158 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Influenza vaccine Clear all
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Reverse Genetic H9N2 Influenza Vaccine Study in Adults

NCT01320696
View directory record Official record
Conditions
Influenza
Interventions
Reverse Genetic (RG) reassortant A/H9N2 influenza vaccine
Biological
Lead sponsor
Alachua Government Services, Inc.
Industry
Eligibility
18 Years to 49 Years
Enrollment
353 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
5
States / cities
Huntsville, Alabama • Melbourne, Florida • Peoria, Illinois + 2 more
Source: ClinicalTrials.gov public record
Updated Feb 16, 2023 · Synced Oct 15, 2026, 4:07 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Safety and Immunogenicity of the Bris10 M2SR and Sing2016 M2SR H3N2 Monovalent Influenza Vaccines

NCT03999554
View directory record Official record
Conditions
Influenza A
Interventions
LD Sing2016 M2SR H3N2 influenza vaccine, MD Sing2016 M2SR H3N2 influenza vaccine, HD Sing2016 M2SR H3N2 influenza vaccine, LD Bris10 M2SR H3N2 influenza vaccine, Placebo
Biological · Other
Lead sponsor
FluGen Inc
Industry
Eligibility
18 Years to 49 Years
Enrollment
206 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
4
States / cities
Hollywood, Florida • Lenexa, Kansas • Lexington, Kentucky + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 4, 2022 · Synced Oct 15, 2026, 4:07 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Influenza Vaccine in Pediatric Transplant Subjects

NCT00133510
View directory record Official record
Conditions
Influenza
Interventions
Trivalent Subviron Influenza vaccine (Fluzone)
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
6 Months to 17 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2006
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 27, 2010 · Synced Oct 15, 2026, 4:07 PM EDT
Terminated Phase 3 Interventional Accepts healthy volunteers Results available

Multi-Year Study of Fluzone High-Dose Influenza Vaccine Compared With Fluzone® Vaccine in Adults Aged 65 Years and Older

NCT00976027
View directory record Official record
Conditions
Influenza
Interventions
Trivalent inactivated influenza vaccine High Dose, Trivalent inactivated influenza vaccine
Biological
Lead sponsor
Sanofi
Industry
Eligibility
65 Years and older
Enrollment
9,172 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
96
States / cities
Birmingham, Alabama • Glendale, Arizona • Mesa, Arizona + 86 more
Source: ClinicalTrials.gov public record
Updated Aug 1, 2012 · Synced Oct 15, 2026, 4:07 PM EDT
Completed Not applicable Interventional Results available

Precision Vaccine Promotion in Underserved Populations

NCT05537441
View directory record Official record
Conditions
Influenza, Vaccine Hesitancy
Interventions
Text messaging
Behavioral
Lead sponsor
University of Southern California
Other
Eligibility
6 Months and older
Enrollment
228,831 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Oct 1, 2024 · Synced Oct 15, 2026, 4:07 PM EDT
Completed Phase 2 Interventional Results available

Safety Study to Assess IV Zanamivir for Treatment of Influenza Infection in Patients Who Are in Hospital

NCT01014988
View directory record Official record
Conditions
Influenza, Human
Interventions
zanamivir aqueous solution
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
6 Months and older
Enrollment
202 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2015
U.S. locations
40
States / cities
Birmingham, Alabama • Phoenix, Arizona • Little Rock, Arkansas + 33 more
Source: ClinicalTrials.gov public record
Updated Mar 28, 2017 · Synced Oct 15, 2026, 4:07 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Immune Response Following Seasonal Influenza Vaccination

NCT03163342
View directory record Official record
Conditions
Influenza
Interventions
Licensed seasonal influenza vaccine
Biological
Lead sponsor
Altimmune, Inc.
Industry
Eligibility
18 Years to 50 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Rockville, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 26, 2019 · Synced Oct 15, 2026, 4:07 PM EDT
Completed Not applicable Interventional

Adult Influenza Vaccination Text Message Reminders With Electronic Health Record Alerts

NCT02284594
View directory record Official record
Conditions
Influenza
Interventions
text message
Behavioral
Lead sponsor
Columbia University
Other
Eligibility
18 Years and older
Enrollment
4,026 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated May 19, 2015 · Synced Oct 15, 2026, 4:07 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Rapid Vaccination of Hard-To-Reach Populations

NCT00155974
View directory record Official record
Conditions
Influenza
Interventions
Community-based vaccine outreach intervention
Biological
Lead sponsor
The New York Academy of Medicine
Other
Eligibility
18 Years and older
Enrollment
4,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2005
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Sep 22, 2006 · Synced Oct 15, 2026, 4:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Mail Outreach To Increase Vaccination Acceptance Through Engagement

NCT02243774
View directory record Official record
Conditions
Influenza, Human, Influenza, Human Flu
Interventions
Core letter signed by Surgeon General, Core letter signed by the Director of the National Vaccine Program, Core letter signed by Surgeon General + implementation prompt, Core letter signed by SG + enhanced implementation prompt
Behavioral
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
66 Years and older
Enrollment
228,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 12, 2017 · Synced Oct 15, 2026, 4:07 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Influenza Virus Vaccine Plus Vitamin A and D Supplements for Prevention of Respiratory Virus Infections in Children

NCT02649192
View directory record Official record
Conditions
Healthy Participants
Interventions
Influenza virus vaccine, Vitamins A and D, Placebo
Biological · Dietary Supplement · Other
Lead sponsor
St. Jude Children's Research Hospital
Other
Eligibility
2 Years to 8 Years
Enrollment
87 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 29, 2019 · Synced Oct 15, 2026, 4:07 PM EDT
Completed Phase 1 Interventional

High-Dose Trivalent Influenza Vaccine in Inducing Immune Response Patients With Central Nervous System Tumors

NCT01941758
View directory record Official record
Conditions
Central Nervous System Neoplasm
Interventions
trivalent influenza vaccine, laboratory biomarker analysis
Biological · Other
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years and older
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
2
States / cities
Baltimore, Maryland • Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 5, 2018 · Synced Oct 15, 2026, 4:07 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Project IMPACT Immunizations (IMProving America's Communities Together)

NCT02584036
View directory record Official record
Conditions
Influenza
Interventions
Vaccine administration by a pharmacist, Unmet vaccination needs identified and met, Vaccination forecast review and patient education
Biological · Behavioral
Lead sponsor
American Pharmacists Association Foundation
Other
Eligibility
18 Years and older
Enrollment
1,080 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
8
States / cities
Belfair, Washington • Cheney, Washington • Eatonville, Washington + 5 more
Source: ClinicalTrials.gov public record
Updated Jul 12, 2016 · Synced Oct 15, 2026, 4:07 PM EDT
Completed Phase 2 Interventional Results available

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

NCT02566265
View directory record Official record
Conditions
Influenza, Multiple Myeloma, Waldenstrom's Macroglobulinemia, Plasma Cell Disorders, MGUS
Interventions
Fluzone High Dose Vaccine, Standard of care/Placebo
Biological
Lead sponsor
Yale University
Other
Eligibility
18 Years to 90 Years
Enrollment
122 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jan 30, 2019 · Synced Oct 15, 2026, 4:07 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

A Study of Ad26.COV2.S and Influenza Vaccines in Healthy Adults

NCT05091307
View directory record Official record
Conditions
COVID-19 Prevention
Interventions
Ad26.COV2.S, Placebo, Influenza Vaccine
Biological · Other
Lead sponsor
Janssen Vaccines & Prevention B.V.
Industry
Eligibility
18 Years and older
Enrollment
861 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
17
States / cities
Tempe, Arizona • San Diego, California • Coral Gables, Florida + 12 more
Source: ClinicalTrials.gov public record
Updated May 25, 2025 · Synced Oct 15, 2026, 4:07 PM 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 15, 2026, 4:07 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Home Testing of Respiratory Illness

NCT04245800
View directory record Official record
Conditions
Influenza -Like Illness, Influenza A, Influenza Type B, Respiratory Viral Infection, Respiratory Tract Infections
Interventions
Not listed
Lead sponsor
Evidation Health
Industry
Eligibility
18 Years and older
Enrollment
5,233 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
San Mateo, California
Source: ClinicalTrials.gov public record
Updated Jul 22, 2020 · Synced Oct 15, 2026, 4:07 PM 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 15, 2026, 4:07 PM 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 15, 2026, 4:07 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

A Study to Evaluate the Safety and Immune Responses to Fluzone® Vaccination

NCT00743275
View directory record Official record
Conditions
Influenza
Interventions
Split, Inactivated, Trivalent Influenza vaccine (Fluzone®)
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
18 Years and older
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
Norfolk, Virginia
Source: ClinicalTrials.gov public record
Updated May 16, 2016 · Synced Oct 15, 2026, 4:07 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

CSL H1N1 Influenza Vaccine Administered at Two Dose Levels in Adult and Elderly Populations

NCT00943488
View directory record Official record
Conditions
Influenza
Interventions
Inactivated H1N1 Vaccine
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years and older
Enrollment
408 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
4
States / cities
Iowa City, Iowa • Cincinnati, Ohio • Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Oct 31, 2012 · Synced Oct 15, 2026, 4:07 PM EDT
Not listed Phase 3 Interventional Accepts healthy volunteers

Study of the Protective Effect of an Injectable Influenza Vaccine Against Influenza Illness in Adults Under 50 y.o.

NCT00216242
View directory record Official record
Conditions
Influenza
Interventions
Influenza virus vaccine (Fluviral), Saline placebo
Biological
Lead sponsor
ID Biomedical Corporation, Quebec
Industry
Eligibility
18 Years to 49 Years
Enrollment
7,400 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2007
U.S. locations
43
States / cities
Sacramento, California • San Francisco, California • Denver, Colorado + 34 more
Source: ClinicalTrials.gov public record
Updated Dec 11, 2006 · Synced Oct 15, 2026, 4:07 PM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Vaccination Response in Individual Monozygotic Twins

NCT02296359
View directory record Official record
Conditions
Individuality, Asthma, Immune System and Related Disorders
Interventions
Influenza Vaccination
Biological
Lead sponsor
Michigan State University
Other
Eligibility
18 Years to 80 Years
Enrollment
1 participant
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
East Lansing, Michigan
Source: ClinicalTrials.gov public record
Updated Aug 14, 2015 · Synced Oct 15, 2026, 4:07 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Evaluation of Influenza-Specific Immune Responses in Children and Adults During the 2010-2011 Influenza Season in the U.S.

NCT01262079
View directory record Official record
Conditions
Influenza
Interventions
Not listed
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
6 Years and older
Enrollment
180 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
4
States / cities
Decatur, Georgia • St Louis, Missouri • Cincinnati, Ohio + 1 more
Source: ClinicalTrials.gov public record
Updated Aug 15, 2011 · Synced Oct 15, 2026, 4:07 PM EDT