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Showing 1–24 of 80 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Adult Influenza Vaccinations Clear all
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Evaluate Safety & Immunogenicity of GSK Bio's Influenza Vaccine GSK576389A After Repeated Vaccination in Elderly Adults

NCT00529516
View directory record Official record
Conditions
Influenza
Interventions
Fluarix, GSK Biologicals Influenza Vaccine GSK576389A
Biological
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years and older
Enrollment
1,252 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
9
States / cities
Clearwater, Florida • Coral Gables, Florida • Milford, Massachusetts + 6 more
Source: ClinicalTrials.gov public record
Updated Jun 7, 2018 · Synced Sep 10, 2026, 9:57 PM EDT
Completed Not applicable Interventional

Effectiveness of Influenza Vaccine Reminder Systems

NCT01852656
View directory record Official record
Conditions
Asthma, Chronic Obstructive Pulmonary Disease
Interventions
Postcard and IVR Reminder Group, Postcard Only Reminder Group, IVR Only Reminder Group
Behavioral
Lead sponsor
Kaiser Permanente
Other
Eligibility
19 Years to 64 Years
Enrollment
12,255 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated May 13, 2013 · Synced Sep 10, 2026, 9:57 PM 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 10, 2026, 9:57 PM EDT
Not yet recruiting Phase 4 Interventional Accepts healthy volunteers

How Healthy Adults Respond to the Nasal Flu Vaccine

NCT07726862
View directory record Official record
Conditions
Mucosal Immune Response to Influenza Vaccination
Interventions
FluMist (Live Attenuated Influenza Vaccine)
Biological
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2031
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Jul 23, 2026 · Synced Sep 10, 2026, 9:57 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Post-Marketing Observational Study of Safety Following Vaccination With Flublok® Compared to Licensed IIV in Adults

NCT02600585
View directory record Official record
Conditions
Human Influenza
Interventions
Recombinant Influenza Vaccine, Inactivated Influenza Vaccine
Biological
Lead sponsor
Protein Sciences Corporation
Industry
Eligibility
18 Years and older
Enrollment
254,648 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Oakland, California
Source: ClinicalTrials.gov public record
Updated Oct 11, 2017 · Synced Sep 10, 2026, 9:57 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Plasmablast Trafficking and Antibody Response in Influenza Vaccination (SLVP021 2011-2014)

NCT02141581
View directory record Official record
Conditions
Influenza
Interventions
Fluzone® (IM), Fluzone® Intradermal (ID), 2011-2012 FluMist®
Biological
Lead sponsor
Stanford University
Other
Eligibility
8 Years to 34 Years
Enrollment
86 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated May 6, 2018 · Synced Sep 10, 2026, 9:57 PM 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 10, 2026, 9:57 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Phase I Study Priming With an Inactivated A/H7N9 Influenza Virus Vaccine With or Without MF59 Adjuvant Followed by Live Attenuated A/H7N9 Influenza Virus Vaccine

NCT02251288
View directory record Official record
Conditions
Avian Influenza, Immunisation
Interventions
Influenza Virus Vaccine, Live Attenuated H7N9 Anhui 2013/AA ca, Influenza Virus Vaccine, Monovalent A/H7N9 A/Shanghai/2/2013, MF59 adjuvant
Biological · Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 47 Years
Enrollment
62 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2018
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Jan 26, 2020 · Synced Sep 10, 2026, 9:57 PM 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 10, 2026, 9:57 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Higher Dose Intradermal H5 Vaccine

NCT00439335
View directory record Official record
Conditions
Influenza
Interventions
Inactivated Influenza A Vaccine A/H5N1, Placebo (IM), Placebo (ID)
Biological · Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 49 Years
Enrollment
227 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Apr 8, 2013 · Synced Sep 10, 2026, 9:57 PM EDT
Completed Phase 3 Interventional Results available

Study to Assess the Effect of Tezepelumab on the Immune Response to Influenza Vaccination in Participants With Asthma

NCT05062759
View directory record Official record
Conditions
Moderate to Severe Asthma
Interventions
Tezepelumab, Placebo
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
12 Years to 21 Years
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
15
States / cities
Bakersfield, California • Huntington Beach, California • Miami, Florida + 12 more
Source: ClinicalTrials.gov public record
Updated Jun 21, 2023 · Synced Sep 10, 2026, 9:57 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Study of Recombinant Influenza Vaccine Containing Different H3 Antigens Without or With Adjuvant in Healthy Adult Subjects

NCT04451954
View directory record Official record
Conditions
Influenza Immunisation, Healthy Volunteers
Interventions
Quadrivalent RIV with H3 strain 1, Quadrivalent RIV with H3 strain 1 and adjuvant, Quadrivalent RIV with H3 strain 2, Quadrivalent RIV with H3 strain 2 and adjuvant, Quadrivalent RIV with 2018-2019 NH H3 strain, Quadrivalent RIV with 2018-2019 NH H3 strain and adjuvant
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
18 Years and older
Enrollment
210 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
5
States / cities
San Diego, California • Melbourne, Florida • Orlando, Florida + 2 more
Source: ClinicalTrials.gov public record
Updated Sep 16, 2025 · Synced Sep 10, 2026, 9:57 PM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Increasing COVID-19, Influenza, and Pneumonia Vaccine Uptake

NCT04761692
View directory record Official record
Conditions
Covid19, Influenza, Pneumonia, Vaccine Refusal
Interventions
Full VEPMP Intervention, Partial VEPMP Intervention, Delayed VEPMP Intervention
Behavioral
Lead sponsor
Charles Drew University of Medicine and Science
Other
Eligibility
65 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Aug 18, 2022 · Synced Sep 10, 2026, 9:57 PM EDT
Completed Phase 1 Interventional

HIV Vaccine Designed for HIV Infected Adults Taking Anti-HIV Drugs

NCT00056758
View directory record Official record
Conditions
HIV Infections
Interventions
Autologous Dendritic Cell HIV Vaccination
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years and older
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2003
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 26, 2007 · Synced Sep 10, 2026, 9:57 PM EDT
Active, not recruiting Phase 2 Interventional

High vs. Standard Dose Influenza Vaccine in Adult SOT Recipients

NCT04613206
View directory record Official record
Conditions
Immunization; Infection, Transplantation Infection, Influenza, Solid Organ Transplant
Interventions
High Dose Quadrivalent Inactivated Influenza Vaccine, Standard Dose Quadrivalent Inactivated Influenza Vaccine
Biological
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
396 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 20, 2026 · Synced Sep 10, 2026, 9:57 PM EDT
Recruiting Phase 4 Interventional Accepts healthy volunteers

Characterizing the Human Airway Immune Response to FluMist Vaccination

NCT07177417
View directory record Official record
Conditions
Healthy Young Adults, Influenza Vaccines, Influenza Vaccine Response
Interventions
FluMist, inactivated influenza vaccine, bronchoscopy
Biological · Procedure
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 40 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2028
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Sep 16, 2025 · Synced Sep 10, 2026, 9:57 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

H5N1 With or Without Topical Aldara in Healthy Adults

NCT03472976
View directory record Official record
Conditions
Avian Influenza, Influenza Immunisation
Interventions
Aqueous Cream B.P., Imiquimod, Influenza Virus Vaccine, Monovalent A/H5N1 A/Vietnam/1203/04
Other · Drug · Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 49 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Feb 23, 2020 · Synced Sep 10, 2026, 9:57 PM 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 10, 2026, 9:57 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

Study to Evaluate Safety and Immunogenicity of a Pandemic Flu H5 mRNA Vaccine in Healthy Adults Aged 18 Years and Older

NCT06727058
View directory record Official record
Conditions
Influenza Immunization
Interventions
Pandemic flu H5 mRNA vaccine, Placebo
Biological · Other
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
18 Years and older
Enrollment
276 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
14
States / cities
La Mesa, California • DeLand, Florida • Lakeland, Florida + 11 more
Source: ClinicalTrials.gov public record
Updated Apr 22, 2026 · Synced Sep 10, 2026, 9:57 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Influenza Immunization in Adults Over Age 75

NCT02200276
View directory record Official record
Conditions
Influenza, Immunization, Older Adults, Over Age 75
Interventions
Influenza
Biological
Lead sponsor
Johns Hopkins University
Other
Eligibility
75 Years and older
Enrollment
1,025 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2027
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 15, 2026 · Synced Sep 10, 2026, 9:57 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Study to Evaluate Safety and Immunogenicity of Different Priming and Booster Regimens With Adjuvanted H5N8 and/or H5N6 Influenza Vaccine in Adults

NCT05874713
View directory record Official record
Conditions
Influenza, Human, Infections, Respiratory Tract Infections, Virus Diseases, Infection Viral
Interventions
aH5N8c on Day 1, aH5N6c on Day 1, aH5N8c on Day 22, aH5N6c on Day 22, aH5N8c on Day 202
Biological
Lead sponsor
Seqirus
Industry
Eligibility
18 Years and older
Enrollment
480 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
9
States / cities
Cullman, Alabama • Lilburn, Georgia • Norcross, Georgia + 6 more
Source: ClinicalTrials.gov public record
Updated Dec 12, 2024 · Synced Sep 10, 2026, 9:57 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Flublok or Fluzone With Advax-CpG55.2 or AF03

NCT03945825
View directory record Official record
Conditions
Influenza, Influenza Immunisation
Interventions
AF03, Delta Inulin-CpG55.2, Influenza Virus Quadrivalent Inactivated Vaccine, Quadrivalent Recombinant Seasonal Influenza Vaccine
Drug · Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 45 Years
Enrollment
241 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
8
States / cities
Atlanta, Georgia • Iowa City, Iowa • Baltimore, Maryland + 5 more
Source: ClinicalTrials.gov public record
Updated Oct 13, 2025 · Synced Sep 10, 2026, 9:57 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Motivational Interviewing for Vaccine Uptake in Latinx Adults

NCT06062056
View directory record Official record
Conditions
Vaccine Hesitancy
Interventions
EHR alert, Motivational Interviewing, Warm hand off to nurse
Other · Behavioral
Lead sponsor
Boston College
Other
Eligibility
18 Years and older
Enrollment
3,698 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
2
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 14, 2025 · Synced Sep 10, 2026, 9:57 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

Safety and Immunogenicity of Quadrivalent Influenza mRNA Vaccine MRT5413 in Adult Participants18 Years of Age and Older

NCT05650554
View directory record Official record
Conditions
Influenza Immunization
Interventions
Quadrivalent Influenza mRNA Vaccine MRT5413, Quadrivalent Recombinant Influenza Vaccine, Quadrivalent Influenza Standard Dose Vaccine, Quadrivalent Influenza High-Dose Vaccine
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
18 Years and older
Enrollment
682 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
28
States / cities
Chula Vista, California • Gardena, California • Long Beach, California + 24 more
Source: ClinicalTrials.gov public record
Updated Mar 18, 2025 · Synced Sep 10, 2026, 9:57 PM EDT