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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Influenza vaccination Clear all
Completed Phase 4 Interventional Results available

H1N1 Influenza Vaccine Immunogenicity in HIV-1 Infected Patients

NCT01111162
View directory record Official record
Conditions
HIV Infections
Interventions
H1N1 vaccination
Biological
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 11, 2016 · Synced Sep 29, 2026, 7:27 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Influenza Vaccination Digital Interventions for People Living With Diabetes

NCT03870997
View directory record Official record
Conditions
Diabetes
Interventions
Diabetes Digital Intervention, Generic Digital Intervention
Behavioral
Lead sponsor
Evidation Health
Industry
Eligibility
18 Years and older
Enrollment
94,321 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
San Mateo, California
Source: ClinicalTrials.gov public record
Updated Jun 8, 2020 · Synced Sep 29, 2026, 7:27 AM EDT
Not listed Phase 2 Interventional

Offering Influenza and Pneumococcal Vaccine to Patients Being Evaluated in the Emergency Department

NCT00380679
View directory record Official record
Conditions
High Risk for Serious Influenza, High Risk for Pneumonia
Interventions
Influenza vaccination, Pneumococcal polysaccharide vaccination
Biological
Lead sponsor
Louisiana State University Health Sciences Center in New Orleans
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2006
U.S. locations
2
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Sep 25, 2006 · Synced Sep 29, 2026, 7:27 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Safety and Reactogenicity of FluBlok and Comparison of Immunogenicity, Efficacy and Effectiveness Against TIV

NCT00539864
View directory record Official record
Conditions
Influenza
Interventions
FluBlok Influenza Vaccination, TIV (Fluzone) Influenza Vaccination
Biological
Lead sponsor
Protein Sciences Corporation
Industry
Eligibility
50 Years to 64 Years
Enrollment
602 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
5
States / cities
Fresno, California • Hayward, California • Roseville, California + 2 more
Source: ClinicalTrials.gov public record
Updated Jul 26, 2011 · Synced Sep 29, 2026, 7:27 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Experimental AD4-H5-VTN Vaccine in Healthy Volunteers

NCT01443936
View directory record Official record
Conditions
H5N1 Influenza
Interventions
Ad4-H5-VTN vaccination-tonsillar route, Ad4-H5-vaccination-oral route
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 49 Years
Enrollment
96 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2019
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 15, 2019 · Synced Sep 29, 2026, 7:27 AM EDT
Completed Not applicable Interventional Results available

Lottery Incentive Nudges to Increase Influenza Vaccinations

NCT05012163
View directory record Official record
Conditions
Influenza, Vaccination, Health Promotion, Health Behavior
Interventions
Reminder, Financial incentive, Lottery
Behavioral
Lead sponsor
National Bureau of Economic Research, Inc.
Other
Eligibility
18 Years and older
Enrollment
57,581 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Danville, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 29, 2024 · Synced Sep 29, 2026, 7:27 AM EDT
Completed Not applicable Interventional

Respiratory Disease Management

NCT01543217
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease
Interventions
RT management, Ususal care
Other
Lead sponsor
Barnes-Jewish Hospital
Other
Eligibility
18 Years to 64 Years
Enrollment
428 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jul 22, 2021 · Synced Sep 29, 2026, 7:27 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Immune Response to Influenza Vaccine in HIV-Infected Individuals

NCT00069914
View directory record Official record
Conditions
HIV Infections
Interventions
Not listed
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
Not listed
Enrollment
165 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2005
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Sep 29, 2026, 7:27 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

A Study to Evaluate the Safety and Tolerability of Trivalent Influenza Virus Vaccine in Children Aged 5 Years to < 9 Years

NCT02212106
View directory record Official record
Conditions
Influenza, Human
Interventions
bioCSL Trivalent Influenza Virus Vaccine (CSL TIV), Comparator Quadrivalent Influenza Virus Vaccine
Biological
Lead sponsor
Seqirus
Industry
Eligibility
5 Years to 8 Years
Enrollment
402 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014
U.S. locations
11
States / cities
Los Angeles, California • Boise, Idaho • St Louis, Missouri + 8 more
Source: ClinicalTrials.gov public record
Updated Oct 15, 2015 · Synced Sep 29, 2026, 7:27 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 29, 2026, 7:27 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

A Safety and Immunogenicity of Intranasal Nanoemulsion Adjuvanted Recombinant Pandemic Flu Vaccine in Healthy Adults

NCT05397119
View directory record Official record
Conditions
Influenza, Pandemic
Interventions
BW-1014: 25 µg rH5 in 20% NE - pipette - IN, BW-1014: 50 µg rH5 in 20% NE - pipette - IN, BW-1014: 100 µg rH5 in 20% NE - pipette - IN, rH5 (100 µg) control - pipette - IN, Saline (Placebo) - pipette - IN, H5N1 IIV - IM
Biological
Lead sponsor
BlueWillow Biologics
Industry
Eligibility
18 Years to 45 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 29, 2026 · Synced Sep 29, 2026, 7:27 AM EDT
Active, not recruiting No phase listed Observational

Vaccine Responses in Cancer

NCT06605625
View directory record Official record
Conditions
Viral Vaccines
Interventions
Influenza vaccination, SARS-CoV-2 vaccine, Zoster Vaccine Recombinant
Biological
Lead sponsor
Abramson Cancer Center at Penn Medicine
Other
Eligibility
Not listed
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2028
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 27, 2025 · Synced Sep 29, 2026, 7:27 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

The Immunologic Basis for an Attenuated Immune Response to the Influenza Vaccine After Repeated Annual Vaccination

NCT02876159
View directory record Official record
Conditions
Influenza
Interventions
2016-2017 Influenza Vaccine
Biological
Lead sponsor
Emory University
Other
Eligibility
20 Years to 30 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Dec 11, 2018 · Synced Sep 29, 2026, 7:27 AM EDT
Completed No phase listed Observational

Characterization of the Innate Immune Response in Healthy NIH Employees at Baseline and After Immunization With the H1N1 Vaccine

NCT00995527
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Not listed
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
18 Years and older
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 5, 2017 · Synced Sep 29, 2026, 7:27 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

A Study to Evaluate the Safety, Tolerability, and Immunogenicity of V114 When Administered Concomitantly With Influenza Vaccine in Healthy Adults 50 Years of Age or Older (V114-021/PNEU-FLU)

NCT03615482
View directory record Official record
Conditions
Pneumococcal Infections
Interventions
V114, QIV, Matching Placebo for V114
Biological
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
50 Years and older
Enrollment
1,200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
45
States / cities
Birmingham, Alabama • Chandler, Arizona • Mesa, Arizona + 39 more
Source: ClinicalTrials.gov public record
Updated May 21, 2024 · Synced Sep 29, 2026, 7:27 AM EDT
Completed Phase 2 Interventional Results available

Flu Vaccine Response in Patients on Biologic Therapies

NCT03277703
View directory record Official record
Conditions
Rheumatologic Disorder, Inflammatory Bowel Diseases, Immune Complex Diseases
Interventions
Influenza vaccine
Biological
Lead sponsor
Stony Brook University
Other
Eligibility
3 Years to 22 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
East Setauket, New York
Source: ClinicalTrials.gov public record
Updated Aug 5, 2026 · Synced Sep 29, 2026, 7:27 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 2021-2022 Formulations of Fluzone Quadrivalent Vaccine and Fluzone High-Dose Quadrivalent Vaccine, Respectively

NCT05050318
View directory record Official record
Conditions
Influenza Immunization, Healthy Volunteers
Interventions
Fluzone Quadrivalent vaccine, No Preservative (0.5-mL dose), 2021-2022 formulation, Fluzone High-Dose Quadrivalent vaccine (0.7-mL dose), 2021-2022 formulation
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
6 Months and older
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
2
States / cities
Bardstown, Kentucky • Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Sep 11, 2025 · Synced Sep 29, 2026, 7:27 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Cell Mediated Immunity in Older Adults

NCT01189123
View directory record Official record
Conditions
Immunity to Influenza Vaccine
Interventions
High dose influenza vaccine Sanofi-Pasteur, fluzone by sanofi pasteur
Biological
Lead sponsor
Vanderbilt University
Other
Eligibility
65 Years and older
Enrollment
105 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 23, 2014 · Synced Sep 29, 2026, 7:27 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Study to Evaluate the Safety and Immune Response of Two-Doses of Candidate Influenza Vaccine GSK 1557484A in Adults

NCT00510874
View directory record Official record
Conditions
Influenza
Interventions
Pumarix™, Pandemrix ™
Biological
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 64 Years
Enrollment
780 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
7
States / cities
Huntsville, Alabama • Anaheim, California • Miami, Florida + 4 more
Source: ClinicalTrials.gov public record
Updated Aug 16, 2018 · Synced Sep 29, 2026, 7:27 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Comparative Immunogenicity of Concomitant vs Sequential mRNA COVID-19 and Influenza Vaccinations

NCT06020118
View directory record Official record
Conditions
Influenza, COVID-19
Interventions
Simultaneous Vaccination (Influenza Vaccine and mRNA COVID booster), Sequential Vaccination (Influenza vaccine then mRNA COVID booster), Sequential Vaccination (mRNA COVID booster then Influenza vaccine)
Biological
Lead sponsor
Duke University
Other
Eligibility
6 Years to 64 Years
Enrollment
455 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
8
States / cities
Phoenix, Arizona • Tempe, Arizona • Atlanta, Georgia + 4 more
Source: ClinicalTrials.gov public record
Updated Jun 12, 2025 · Synced Sep 29, 2026, 7:27 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Promoting Altruism to Enhance Vaccine Acceptance

NCT04568590
View directory record Official record
Conditions
Vaccine Refusal
Interventions
educational intervention
Behavioral
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
Not listed
Enrollment
510 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 11, 2024 · Synced Sep 29, 2026, 7:27 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 29, 2026, 7:27 AM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

Assessing Choice in the Employer Setting (ACES) Study

NCT00808808
View directory record Official record
Conditions
Healthy
Interventions
Choice of TIV or FluMist with baseline advertisement, Choice of TIV or FluMist with enhanced advertisement and incentives, Control - Usual care offering TIV only with baseline advertisement
Biological · Other
Lead sponsor
MedImmune LLC
Industry
Eligibility
18 Years and older
Enrollment
4,411 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
47
States / cities
Chatsworth, California • Novato, California • Sacramento, California + 34 more
Source: ClinicalTrials.gov public record
Updated Nov 19, 2013 · Synced Sep 29, 2026, 7:27 AM 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 29, 2026, 7:27 AM EDT