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Showing 1–24 of 266 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Influenza Immunisation Clear all
Completed Phase 2 Interventional Accepts healthy volunteers

Comparison of Delivery Routes of Flu Vaccine in Adults

NCT00170547
View directory record Official record
Conditions
Influenza
Interventions
Trivalent inactivated influenza vaccine
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 64 Years
Enrollment
1,597 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2006
U.S. locations
10
States / cities
Stanford, California • Torrance, California • Iowa City, Iowa + 7 more
Source: ClinicalTrials.gov public record
Updated Dec 4, 2014 · Synced Sep 5, 2026, 2:45 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Flu Vaccine in Preventing Influenza Infection in Healthy Volunteers and in Patients Who Have Undergone Stem Cell Transplant

NCT00964821
View directory record Official record
Conditions
Chronic Myeloproliferative Disorders, Leukemia, Lymphoma, Multiple Myeloma and Plasma Cell Neoplasm, Myelodysplastic Syndromes, Myelodysplastic/Myeloproliferative Neoplasms, Nonmalignant Neoplasm
Interventions
trivalent influenza vaccine, Immunoenzyme technique, Laboratory biomarker analysis
Biological · Other
Lead sponsor
City of Hope Medical Center
Other
Eligibility
18 Years to 120 Years
Enrollment
459 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2013
U.S. locations
2
States / cities
Duarte, California • Pasadena, California
Source: ClinicalTrials.gov public record
Updated Nov 6, 2017 · Synced Sep 5, 2026, 2:45 AM EDT
Completed Phase 2 Interventional

Influenza Vaccination in Patients Receiving Antineoplastic Therapy for Non-Hodgkin's Lymphoma

NCT00307710
View directory record Official record
Conditions
Lymphoma
Interventions
Trivalent Baculovirus-expressed Influenza HA vaccine
Biological
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2007
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 30, 2012 · Synced Sep 5, 2026, 2:45 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

A Study to Evaluate Safety and Immunogenicity of One or Two Booster Vaccinations With H5N6 Influenza Vaccine in Adults Primed With H5N1 Influenza Vaccine or Unprimed

NCT05422326
View directory record Official record
Conditions
Influenza, Human, Influenza in Birds, Respiratory Tract Infections, Infections, Orthomyxoviridae Infections, RNA Virus Infections, Virus Diseases, Respiratory Tract Diseases
Interventions
aH5N6c on Day 1, aH5N6c on Day 22, Placebo on Day 22
Biological
Lead sponsor
Seqirus
Industry
Eligibility
18 Years and older
Enrollment
260 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
18
States / cities
Huntsville, Alabama • Tempe, Arizona • San Diego, California + 14 more
Source: ClinicalTrials.gov public record
Updated May 12, 2026 · Synced Sep 5, 2026, 2:45 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

A Study on the Immune Response and Safety of the Shingles Vaccine and the Influenza Vaccine When Either is Given to Healthy Adults at the Same Time or Following a COVID-19 Booster Vaccine

NCT05047770
View directory record Official record
Conditions
Herpes Zoster
Interventions
HZ/su, Flu D-QIV, mRNA-1273
Biological · Combination Product
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years and older
Enrollment
2,013 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
46
States / cities
Tempe, Arizona • Oxnard, California • San Diego, California + 40 more
Source: ClinicalTrials.gov public record
Updated Nov 12, 2023 · Synced Sep 5, 2026, 2:45 AM EDT
Terminated Phase 4 Interventional Accepts healthy volunteers Results available

Evaluation of Human Immune Responses to Influenza Virus Vaccination in Healthy Volunteers

NCT02385123
View directory record Official record
Conditions
Influenza, Influenza Immunisation
Interventions
Influenza Virus Vaccine Inactivated
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 49 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2020
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Oct 24, 2023 · Synced Sep 5, 2026, 2:45 AM EDT
Completed No phase listed Observational

Maternal Immunization: Giving Immunity For Tomorrow

NCT01496079
View directory record Official record
Conditions
Pregnancy, Influenza
Interventions
Not listed
Lead sponsor
University of Utah
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
166 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Apr 13, 2017 · Synced Sep 5, 2026, 2:45 AM EDT
Terminated No phase listed Observational Accepts healthy volunteers

The NIH UNI Study: Urea Cycle Disorders, Nutrition and Immunity

NCT01421888
View directory record Official record
Conditions
Argininosuccinic Aciduria, Carbamoyl-Phosphate Synthase I Deficiency, Citrullinemia, Ornithine Carbamoyltransferase Deficiency, Hyperargininemia, N-Acetylglutamate Synthase Deficiency
Interventions
Not listed
Lead sponsor
National Human Genome Research Institute (NHGRI)
NIH
Eligibility
2 Years to 99 Years
Enrollment
4 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2013
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 8, 2019 · Synced Sep 5, 2026, 2:45 AM EDT
Completed Not applicable Interventional

Evaluation of the School Kids Influenza Prevention Project

NCT03307642
View directory record Official record
Conditions
Childhood Influenza Vaccination, School-located Influenza Vaccination
Interventions
Text message notification
Other
Lead sponsor
University of Rochester
Other
Eligibility
4 Years to 19 Years
Enrollment
18,540 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Mar 11, 2018 · Synced Sep 5, 2026, 2:45 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Incentives for Influenza Vaccination

NCT06300242
View directory record Official record
Conditions
Influenza Vaccination
Interventions
Reminders, Financial Incentive, Placebo
Behavioral · Other
Lead sponsor
University of Southern California
Other
Eligibility
18 Years and older
Enrollment
69,972 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Martinez, California
Source: ClinicalTrials.gov public record
Updated May 12, 2024 · Synced Sep 5, 2026, 2:45 AM EDT
Completed Not applicable Interventional

Adult Influenza Vaccination Text Message Reminders

NCT01942824
View directory record Official record
Conditions
Influenza Vaccination
Interventions
Text Messages
Behavioral
Lead sponsor
Columbia University
Other
Eligibility
18 Years and older
Enrollment
7,250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 23, 2014 · Synced Sep 5, 2026, 2:45 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

H5N1 Vaccination With and Without AS03: Systems Biology Analysis

NCT01573312
View directory record Official record
Conditions
Influenza
Interventions
ASO3 Adjuvant, Influenza A/H5N1 Vaccine
Drug · Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 49 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 20, 2019 · Synced Sep 5, 2026, 2:45 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Investigating the Effectiveness of a Seasonal Influenza Vaccination Promotion Campaign for Members of a Non-Profit, Community-Based Health Insurance Plan: 2018-2019

NCT03700281
View directory record Official record
Conditions
Influenza, Vaccination
Interventions
Messaging, Incentive
Behavioral
Lead sponsor
The University of Texas Health Science Center at Tyler
Other
Eligibility
18 Years and older
Enrollment
22,584 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Apr 22, 2019 · Synced Sep 5, 2026, 2:45 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Study of Inactivated, Split-Virion Influenza Vaccine Compared With Standard Fluzone Vaccine in Elderly Subjects

NCT00388583
View directory record Official record
Conditions
Orthomyxoviridae Infection, Influenza, Myxovirus Infection
Interventions
Split, Inactivated, Trivalent Influenza Vaccine
Biological
Lead sponsor
Sanofi
Industry
Eligibility
65 Years and older
Enrollment
817 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2008
U.S. locations
17
States / cities
Alabaster, Alabama • Tucson, Arizona • Fountain Valley, California + 14 more
Source: ClinicalTrials.gov public record
Updated Apr 17, 2012 · Synced Sep 5, 2026, 2:45 AM EDT
Completed Not applicable Interventional Results available

The Effect of Fact Versus Myth Messages on Receipt of Influenza Vaccination

NCT01009645
View directory record Official record
Conditions
Influenza Vaccination
Interventions
Fact Only Education Message, Fact and Myth Educational Message, Fact, Myth, Why Educational Message, Control Educational Message
Behavioral
Lead sponsor
Northwestern University
Other
Eligibility
50 Years and older
Enrollment
125 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Oct 29, 2023 · Synced Sep 5, 2026, 2:45 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 25, 2019 · Synced Sep 5, 2026, 2:45 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Adapting Motivational Interviewing for Maternal Immunizations (MI4MI)

NCT04302675
View directory record Official record
Conditions
Maternal Immunization
Interventions
Prevention, Maternal Immunization
Behavioral
Lead sponsor
University of Colorado, Denver
Other
Eligibility
15 Years and older · Female only
Enrollment
1,350 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated May 11, 2023 · Synced Sep 5, 2026, 2:45 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Two Doses of Multimeric-001 (M-001) Followed by Influenza Vaccine

NCT03058692
View directory record Official record
Conditions
Influenza, Influenza Immunisation
Interventions
Influenza Multimeric-001 Vaccine, Placebo, Quadrivalent Recombinant Seasonal Influenza Vaccine
Biological · Other
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 49 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
3
States / cities
Iowa City, Iowa • Cincinnati, Ohio • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 17, 2020 · Synced Sep 5, 2026, 2:45 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Influenza Immunity in Children

NCT02559505
View directory record Official record
Conditions
Influenza
Interventions
Seasonal IIV 0.25 mL dose, Natural influenza infection, Seasonal IIV 0.5 mL dose
Biological · Other
Lead sponsor
University of Rochester
Other
Eligibility
3 Months to 8 Years
Enrollment
134 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2020
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Sep 1, 2021 · Synced Sep 5, 2026, 2:45 AM EDT
Not listed Not applicable Interventional

Immunogenicity of Influenza Vaccine in Long Term Care

NCT02933723
View directory record Official record
Conditions
Influenza
Interventions
Blood Draw
Procedure
Lead sponsor
Insight Therapeutics, LLC
Other
Eligibility
65 Years and older
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2021
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 8, 2021 · Synced Sep 5, 2026, 2:45 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

A Study to Investigate the Safety and Immunogenicity of the Quadrivalent Influenza mRNA Vaccines in Adults Aged 18 Years and Above

NCT06361875
View directory record Official record
Conditions
Influenza Immunization, Healthy Volunteers
Interventions
Quadrivalent Influenza mRNA Vaccine MRT5421, Quadrivalent Influenza mRNA Vaccine MRT5424, Quadrivalent Influenza mRNA Vaccine MRT5429, Quadrivalent Influenza Standard Dose Vaccine, Quadrivalent Influenza High-Dose Vaccine, Quadrivalent Recombinant Influenza Vaccine
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
18 Years and older
Enrollment
908 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
11
States / cities
San Diego, California • Hialeah, Florida • Hollywood, Florida + 8 more
Source: ClinicalTrials.gov public record
Updated Aug 3, 2026 · Synced Sep 5, 2026, 2:45 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 5, 2026, 2:45 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Duration of Immune Response to Influenza Vaccination in Patients With RA

NCT02311855
View directory record Official record
Conditions
Rheumatoid Arthritis
Interventions
Influenza vaccine
Biological
Lead sponsor
Bassett Healthcare
Other
Eligibility
40 Years to 75 Years
Enrollment
87 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
1
States / cities
Cooperstown, New York
Source: ClinicalTrials.gov public record
Updated Jan 5, 2017 · Synced Sep 5, 2026, 2:45 AM EDT
Recruiting Phase 4 Interventional Accepts healthy volunteers

Characterization of Humoral and Cellular Immune Responses Elicited by Influenza Vaccination in Healthy Adults

NCT05108818
View directory record Official record
Conditions
Influenza, Human
Interventions
Seasonal influenza vaccine
Biological
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
700 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2028
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 8, 2026 · Synced Sep 5, 2026, 2:45 AM EDT