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ClinicalTrials.gov public records Last synced Oct 7, 2026, 1:34 AM EDT

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Showing 25–48 of 162 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Seasonal Influenza vaccine Clear all
Completed Not applicable Interventional

School Influenza Vaccine vs Standard of Care With Nested Trial of 2 Parent Notification Intensities

NCT01224301
View directory record Official record
Conditions
Immunizations, Vaccination, Influenza, School Health
Interventions
School based flu vaccine: Low intensity, School based flu vaccine: High intensity
Behavioral
Lead sponsor
Monroe County Department of Public Health
Other
Eligibility
4 Years to 13 Years
Enrollment
25,366 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Apr 4, 2012 · Synced Oct 7, 2026, 1:34 AM EDT
Recruiting Phase 3 Interventional Accepts healthy volunteers

A Study on the Efficacy of a Vaccine Against Influenza in Adults ≥65 Years of Age

NCT07805707
View directory record Official record
Conditions
Influenza, Human
Interventions
mRNA Seasonal Flu vaccine, Licensed Influenza Vaccine
Combination Product
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
65 Years and older
Enrollment
54,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2028
U.S. locations
161
States / cities
Anniston, Alabama • Guntersville, Alabama • Glendale, Arizona + 128 more
Source: ClinicalTrials.gov public record
Updated Sep 18, 2026 · Synced Oct 7, 2026, 1:34 AM EDT
Not yet recruiting Phase 1 Interventional Accepts healthy volunteers

Safety and Immunogenicity of Chimeric Hemagglutinin mRNA Vaccine Candidates

NCT07703514
View directory record Official record
Conditions
Influenza
Interventions
cH15/3, cH4/3, cH5/1N1, cH8/1N1, Saline
Biological · Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 59 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 25, 2026 · Synced Oct 7, 2026, 1:34 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Responses to Influenza Vaccine in Patients With Mitochondrial Disorders (MELAS)

NCT01831934
View directory record Official record
Conditions
MELAS Syndrome
Interventions
Fluzone®
Biological
Lead sponsor
Stanford University
Other
Eligibility
13 Years to 65 Years
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated May 30, 2017 · Synced Oct 7, 2026, 1:34 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Study of Modified mRNA Vaccines in Healthy Adults

NCT05397223
View directory record Official record
Conditions
SARS-CoV-2, Seasonal Influenza, Respiratory Syncytial Virus, Cytomegalovirus
Interventions
mRNA-1273, mRNA-1010, mRNA-1345, FLUAD®, mRNA-1647
Biological
Lead sponsor
ModernaTX, Inc.
Industry
Eligibility
18 Years to 75 Years
Enrollment
308 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
8
States / cities
Hollywood, Florida • Savannah, Georgia • Sioux City, Iowa + 4 more
Source: ClinicalTrials.gov public record
Updated Mar 12, 2026 · Synced Oct 7, 2026, 1:34 AM EDT
Terminated Phase 4 Interventional Accepts healthy volunteers Results available

Kinetics of B-Cell Responses to Live, Attenuated Influenza Vaccine (LAIV) in Young Children Two Years of Age

NCT03020472
View directory record Official record
Conditions
Influenza
Interventions
2008-2009 FluMist LAIV (Intranasal)
Biological
Lead sponsor
Stanford University
Other
Eligibility
24 Months to 35 Months
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Oct 18, 2021 · Synced Oct 7, 2026, 1:34 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Immunogenicity and Safety Study of an Inactivated Influenza Vaccine (Split Virus, Vero Cell Derived) in Adults Aged 50 Years and Older

NCT00782431
View directory record Official record
Conditions
Influenza
Interventions
Vero cell derived, trivalent, seasonal influenza vaccine, Licensed egg-derived, trivalent seasonal influenza vaccine
Biological
Lead sponsor
Alachua Government Services, Inc.
Industry
Eligibility
50 Years and older
Enrollment
3,208 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
30
States / cities
Mobile, Alabama • Tucson, Arizona • Sacramento, California + 25 more
Source: ClinicalTrials.gov public record
Updated Jan 2, 2026 · Synced Oct 7, 2026, 1:34 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

A Study of mRNA-1020 and mRNA-1030 Seasonal Influenza Vaccines in Healthy Adults

NCT05333289
View directory record Official record
Conditions
Seasonal Influenza
Interventions
mRNA-1030, mRNA-1020, mRNA-1010, Active Comparator
Biological
Lead sponsor
ModernaTX, Inc.
Industry
Eligibility
18 Years to 75 Years
Enrollment
572 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
15
States / cities
Phoenix, Arizona • Coral Gables, Florida • Jupiter, Florida + 12 more
Source: ClinicalTrials.gov public record
Updated Feb 1, 2024 · Synced Oct 7, 2026, 1:34 AM EDT
Active, not recruiting Phase 4 Interventional Accepts healthy volunteers

B Cell and Antibody Response to Seasonal Influenza Vaccines in Younger and Older Adults

NCT04101838
View directory record Official record
Conditions
Influenza
Interventions
Fluzone, Flucelvax, Fluzone High-Dose, Fluad
Drug
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years to 80 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2027
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated May 14, 2026 · Synced Oct 7, 2026, 1:34 AM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

Immune Responses to the Flu Shot During Pregnancy

NCT02148874
View directory record Official record
Conditions
Pregnancy
Interventions
influenza virus vaccination
Biological
Lead sponsor
Lisa Christian
Other
Eligibility
18 Years to 42 Years · Female only
Enrollment
287 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2019
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 24, 2019 · Synced Oct 7, 2026, 1:34 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effects of Aging on Primary and Secondary Vaccine Responses

NCT03312699
View directory record Official record
Conditions
Influenza, Hepatitis A, Typhoid, Healthy Adults
Interventions
Fluzone® quadrivalent, Fluzone High Dose, Fluad, Vaqta, Typhim Vi, Vivotif
Biological
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
54 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2023
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Dec 16, 2024 · Synced Oct 7, 2026, 1:34 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Safety and Immune Response of Candidate H1N1 Influenza Vaccine GSK2340274A Following Seasonal Influenza Vaccination in Adults

NCT01059617
View directory record Official record
Conditions
Influenza
Interventions
GSK Biologicals' FluLaval®, Placebo (saline), GSK Biologicals' investigational H1N1 Influenza Vaccine - GSK2340274A, GSK Biologicals' investigational H1N1 Influenza Vaccine - GSK2340273A
Biological
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
19 Years to 40 Years
Enrollment
133 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
3
States / cities
Milford, Massachusetts • Salisbury, North Carolina • Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 20, 2018 · Synced Oct 7, 2026, 1:34 AM EDT
Terminated Phase 4 Interventional Results available

The Impact of Imprinting and Repeated Influenza Vaccination on Adaptive Immunity, Transcriptomics, and Metabolomics

NCT03686514
View directory record Official record
Conditions
Influenza
Interventions
FLUARIX QUADRIVALENT
Biological
Lead sponsor
Emory University
Other
Eligibility
42 Years to 71 Years
Enrollment
39 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jul 13, 2022 · Synced Oct 7, 2026, 1:34 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Evaluation of Antibody Response to High-Dose Seasonal Influenza Vaccination in Patients With Myeloid Malignancy Receiving Chemotherapy and Healthy Volunteers

NCT04484532
View directory record Official record
Conditions
Acute Myeloid Leukemia, Myelodysplastic Syndrome
Interventions
Trivalent Influenza Vaccine
Biological
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
40 Years and older
Enrollment
130 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2022
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Jun 6, 2023 · Synced Oct 7, 2026, 1:34 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Study of Seasonal Influenza Vaccine Against H5N1 Avian Influenza Virus

NCT01044095
View directory record Official record
Conditions
Influenza
Interventions
FluMist® live, attenuated, intranasal seasonal influenza vaccine, Fluzone® inactivated influenza virus vaccine
Biological
Lead sponsor
Armed Forces Research Institute of Medical Sciences, Thailand
Government
Eligibility
18 Years to 49 Years
Enrollment
26 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
0
States / cities
Not listed
Source: ClinicalTrials.gov public record
Updated Jul 23, 2013 · Synced Oct 7, 2026, 1:34 AM EDT
Withdrawn No phase listed Observational

2009 H1N1 Pandemic and Seasonal Influenza in SCI/D: Infection Control Strategies

NCT01270685
View directory record Official record
Conditions
Influenza
Interventions
Not listed
Lead sponsor
US Department of Veterans Affairs
Federal
Eligibility
18 Years to 89 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Hines, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 26, 2015 · Synced Oct 7, 2026, 1:34 AM 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 7, 2026, 1:34 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Immunogenicity Study of an Inactivated Influenza Vaccine (Split Virus, Vero Cell Derived) to Prevent Culture Confirmed Influenza Infection

NCT00800605
View directory record Official record
Conditions
Influenza
Interventions
Vero cell-derived, trivalent, seasonal influenza vaccine, Placebo: Phosphate-buffered saline
Biological
Lead sponsor
Alachua Government Services, Inc.
Industry
Eligibility
18 Years to 49 Years
Enrollment
7,250 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
36
States / cities
Tucson, Arizona • Sacramento, California • San Diego, California + 31 more
Source: ClinicalTrials.gov public record
Updated Nov 24, 2025 · Synced Oct 7, 2026, 1:34 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

A Study of mRNA-1011.1, mRNA-1011.2, and mRNA-1012.1 Candidate Seasonal Influenza Vaccines in Healthy Adults

NCT05827068
View directory record Official record
Conditions
Seasonal Influenza
Interventions
mRNA-1011.1, mRNA-1011.2, mRNA-1012.1, mRNA-1010, mRNA-1010.2, mRNA-1010.3
Biological
Lead sponsor
ModernaTX, Inc.
Industry
Eligibility
50 Years to 75 Years
Enrollment
698 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
22
States / cities
Lakewood, California • Long Beach, California • Fort Collins, Colorado + 19 more
Source: ClinicalTrials.gov public record
Updated Feb 3, 2025 · Synced Oct 7, 2026, 1:34 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

A Study to Evaluate the Reactogenicity, Safety and Immunogenicity of GlaxoSmithKline (GSK) Biologicals' Investigational Supra-seasonal Universal Influenza Vaccines - Inactivated (SUIVs) (GSK3816302A) in Healthy Adults Aged 18 to 39 Years

NCT03275389
View directory record Official record
Conditions
Influenza, Human
Interventions
D-SUIV cH8/1N1+AS03, D-SUIV cH5/1N1+AS03, D-SUIV cH11/1N1+AS03, D-SUIV cH8/1N1+AS01, D-SUIV cH5/1N1+AS01, D-SUIV cH11/1N1+AS01, D-SUIV cH8/1N1, D-SUIV cH5/1N1, D-SUIV cH11/1N1, Placebo, Fluarix Quadrivalent
Biological
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 39 Years
Enrollment
470 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2020
U.S. locations
5
States / cities
South Miami, Florida • Wichita, Kansas • Rochester, New York + 2 more
Source: ClinicalTrials.gov public record
Updated May 7, 2021 · Synced Oct 7, 2026, 1:34 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

A Study to Evaluate the Safety and Immunogenicity of GSK Biologicals' Seasonal Influenza Vaccine in Adults

NCT01196975
View directory record Official record
Conditions
Influenza
Interventions
Quadrivalent seasonal influenza vaccine GSK2282512A, FluLavalTM-VB, FluLavalTM-YB
Biological
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years and older
Enrollment
1,707 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
6
States / cities
Mesa, Arizona • Wichita, Kansas • Elkridge, Maryland + 3 more
Source: ClinicalTrials.gov public record
Updated Sep 21, 2018 · Synced Oct 7, 2026, 1:34 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Inactivated Split Virus Seasonal Influenza Vaccine (Vero Cell-Derived)

NCT01773928
View directory record Official record
Conditions
Influenza
Interventions
Vero cell-derived trivalent influenza vaccine manufactured with the modified manufacturing process (VCIV modified), VCIV manufactured with the current manufacturing process (VCIV current), Fluzone®, licensed trivalent influenza vaccine (TIV)
Biological
Lead sponsor
Alachua Government Services, Inc.
Industry
Eligibility
18 Years and older
Enrollment
1,928 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
20
States / cities
Chandler, Arizona • Anaheim, California • Paramount, California + 17 more
Source: ClinicalTrials.gov public record
Updated Sep 11, 2025 · Synced Oct 7, 2026, 1:34 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

A Study of mRNA-1010 Compared With a Licensed Influenza Vaccine in Adults ≥50 Years of Age

NCT06602024
View directory record Official record
Conditions
Seasonal Influenza
Interventions
mRNA-1010, Fluarix®, Influsplit® Tetra, Fluarix Tetra, Alpharix® Tetra
Biological
Lead sponsor
ModernaTX, Inc.
Industry
Eligibility
50 Years and older
Enrollment
40,805 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
188
States / cities
Anniston, Alabama • Athens, Alabama • Birmingham, Alabama + 150 more
Source: ClinicalTrials.gov public record
Updated Sep 16, 2026 · Synced Oct 7, 2026, 1:34 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Study to Evaluate Immunogenicity and Safety of GlaxoSmithKline (GSK) Biologicals' Quadrivalent Influenza Vaccine GSK2282512A When Administered to Children From 6 to 35 Months of Age

NCT01974895
View directory record Official record
Conditions
Influenza
Interventions
FluLaval® Quadrivalent, Fluzone®
Biological
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
6 Months to 35 Months
Enrollment
316 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
12
States / cities
Sacramento, California • West Covina, California • Altamonte Springs, Florida + 9 more
Source: ClinicalTrials.gov public record
Updated Sep 7, 2018 · Synced Oct 7, 2026, 1:34 AM EDT