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Showing 1–24 of 34 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: High dose influenza vaccination Clear all
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 27, 2026, 5:02 AM EDT
Completed Phase 1Phase 2 Interventional

Lomecel-B on Vaccine-Specific Antibody- Response in Subjects With Aging Frailty

NCT02982915
View directory record Official record
Conditions
Aging Frailty
Interventions
Longeveron Mesenchymal Stem Cells (LMSCs), Fluzone High Dose Vaccine
Biological
Lead sponsor
Longeveron Inc.
Industry
Eligibility
65 Years to 90 Years
Enrollment
62 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2022
U.S. locations
6
States / cities
Coral Gables, Florida • Fort Myers, Florida • Miami, Florida + 2 more
Source: ClinicalTrials.gov public record
Updated Nov 3, 2022 · Synced Sep 27, 2026, 5:02 AM EDT
Completed Not applicable Interventional Results available

Open-Label Influenza Vaccine Evaluation

NCT02872311
View directory record Official record
Conditions
Immune Response
Interventions
High Dose Influenza vaccine, Adjuvanted Influenza vaccine, Standard Dose Influenza vaccine, Recombinant Influenza vaccine
Biological
Lead sponsor
Marshfield Clinic Research Foundation
Other
Eligibility
65 Years to 74 Years
Enrollment
179 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Marshfield, Wisconsin
Source: ClinicalTrials.gov public record
Updated Dec 9, 2025 · Synced Sep 27, 2026, 5:02 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Safety and Immunogenicity of Fluzone® Quadrivalent and Fluzone® High-Dose, Influenza Vaccines, 2016-2017 Formulations

NCT02908269
View directory record Official record
Conditions
Influenza
Interventions
Fluzone Quadrivalent vaccine, 2016-2017 formulation, No Preservative, Fluzone High-Dose, vaccine, 2016-2017 formulation
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
3 Years and older
Enrollment
180 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016
U.S. locations
2
States / cities
Bardstown, Kentucky • Metairie, Louisiana
Source: ClinicalTrials.gov public record
Updated Mar 28, 2022 · Synced Sep 27, 2026, 5:02 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Adjuvanted Influenza Vaccination Year 2 Follow-On Survey

NCT03599739
View directory record Official record
Conditions
Influenza, Influenza-like Illness, Influenza, Human
Interventions
Influenza
Biological
Lead sponsor
Insight Therapeutics, LLC
Other
Eligibility
65 Years and older
Enrollment
598 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2023
U.S. locations
1
States / cities
Norfolk, Virginia
Source: ClinicalTrials.gov public record
Updated Mar 15, 2023 · Synced Sep 27, 2026, 5:02 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Study to Evaluate Immunogenicity, Safety and Tolerability of Adjuvanted and Non-Adjuvanted H2N3 Influenza Vaccines in Adults

NCT05875961
View directory record Official record
Conditions
Influenza, Human, Infections, Respiratory Tract Infections, Virus Diseases, Infection Viral
Interventions
Low dose A/H2N3c + standard dose MF59, Intermediate dose A/H2N3c + standard dose MF59, High dose A/H2N3c + standard dose MF59, High dose A/H2N3c non-adjuvanted, Lowest dose A/H2N3c + high dose MF59, Low dose A/H2N3c + high dose MF59
Biological
Lead sponsor
Seqirus
Industry
Eligibility
18 Years and older
Enrollment
600 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
3
States / cities
Rockville, Maryland • Lincoln, Nebraska • Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Sep 20, 2026 · Synced Sep 27, 2026, 5:02 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 27, 2026, 5:02 AM EDT
Completed Phase 4 Interventional Results available

Influenza Vaccination for Flu Prevention in Patients With Plasma Cell Disorders

NCT04080531
View directory record Official record
Conditions
Plasma Cell Neoplasm
Interventions
Pneumococcal 13-valent Conjugate Vaccine, Trivalent Influenza Vaccine
Biological
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
165 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
2
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Feb 27, 2025 · Synced Sep 27, 2026, 5:02 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Vaccine Acceptance in Pregnant Minority Women

NCT01740310
View directory record Official record
Conditions
Pregnancy
Interventions
Maternal Vaccine Education
Behavioral
Lead sponsor
Emory University
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
121 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
4
States / cities
Atlanta, Georgia • Decatur, Georgia • Riverdale, Georgia
Source: ClinicalTrials.gov public record
Updated Mar 8, 2015 · Synced Sep 27, 2026, 5:02 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 27, 2026, 5:02 AM 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 27, 2026, 5:02 AM EDT
Recruiting Phase 2 Interventional

High vs.Standard Dose Influenza Vaccine in Pediatric Solid Organ Transplant (SOT) Recipients

NCT05947071
View directory record Official record
Conditions
Immunization; Infection, Transplantation Infection, Influenza
Interventions
Standard Dose Quadrivalent Inactivated Influenza Vaccine, High Dose Quadrivalent Inactivated Influenza Vaccine
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
3 Years to 17 Years
Enrollment
312 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
10
States / cities
Stanford, California • Atlanta, Georgia • Chicago, Illinois + 7 more
Source: ClinicalTrials.gov public record
Updated Sep 23, 2026 · Synced Sep 27, 2026, 5:02 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 5, 2023 · Synced Sep 27, 2026, 5:02 AM EDT
Completed Phase 4 Interventional Results available

Improving Immunogenicity of Influenza Vaccine in HIV Infected Individuals

NCT01262846
View directory record Official record
Conditions
HIV Infection
Interventions
Fluzone®
Biological
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
195 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 12, 2017 · Synced Sep 27, 2026, 5:02 AM EDT
Not listed Phase 4 Interventional Accepts healthy volunteers

High-Dose Influenza Vaccine in Nursing Homes

NCT01815268
View directory record Official record
Conditions
Influenza
Interventions
HD Vaccine, SD Vaccine, Free Vaccine, Usual Care
Biological
Lead sponsor
Insight Therapeutics, LLC
Other
Eligibility
65 Years and older
Enrollment
823 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2018
U.S. locations
3
States / cities
Cleveland, Ohio • Providence, Rhode Island • Norfolk, Virginia
Source: ClinicalTrials.gov public record
Updated Jul 15, 2018 · Synced Sep 27, 2026, 5:02 AM EDT
Recruiting Phase 2 Interventional

High vs. Standard Dose Influenza Vaccines in Lung Transplant (Repeater)

NCT07192458
View directory record Official record
Conditions
Immunization; Infection|Transplantation Infection|Influenza, Influenza
Interventions
Fluzone High Dose Inactivated Influenza Vaccine, Fluzone Standard Dose Inactivated Influenza Vaccine
Biological
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2029
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 6, 2025 · Synced Sep 27, 2026, 5:02 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

FLUAD® vs. Fluzone® High-Dose Study

NCT03183908
View directory record Official record
Conditions
Pain, Quality of Life, Injection Site Reaction, Side Effect of Drug, Adverse Drug Event
Interventions
FLUAD®, Fluzone® High-Dose
Biological
Lead sponsor
Duke University
Other
Eligibility
65 Years and older
Enrollment
757 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
4
States / cities
Atlanta, Georgia • Boston, Massachusetts • Durham, North Carolina + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 29, 2021 · Synced Sep 27, 2026, 5:02 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 27, 2026, 5:02 AM EDT
Active, not recruiting Phase 1 Interventional

A Study of KYV-101, a CD19 CAR T Cell Therapy, in Participants With Treatment Refractory Progressive Multiple Sclerosis

NCT06451159
View directory record Official record
Conditions
Progressive Multiple Sclerosis
Interventions
KYV-101 (Biological) - 0.33 ×10^8 cells, KYV-101 (Biological) - 1 ×10^8 cells, Chemotherapy: cyclophosphamide (CYC), Chemotherapy: fludarabine (FLU)
Biological · Drug
Lead sponsor
Bruce Cree
Other
Eligibility
25 Years to 70 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Aug 9, 2026 · Synced Sep 27, 2026, 5:02 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Vaccination Efficacy With Metformin in Older Adults

NCT03996538
View directory record Official record
Conditions
Aging, Age-Related Immunodeficiency, Vaccine Response Impaired
Interventions
Metformin Hydrochloride Extended-Release Tablets, Influenza Vaccine
Drug · Biological
Lead sponsor
UConn Health
Other
Eligibility
65 Years and older
Enrollment
26 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Farmington, Connecticut
Source: ClinicalTrials.gov public record
Updated Jul 22, 2020 · Synced Sep 27, 2026, 5:02 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

H5N1 (Clade 2) Vaccination of Adults and Elderly

NCT00680069
View directory record Official record
Conditions
Influenza
Interventions
Influenza Virus Vaccine, Monovalent A/H5N1 A/Indonesia/05/2005
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
19 Years to 99 Years
Enrollment
517 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
8
States / cities
Stanford, California • Iowa City, Iowa • Baltimore, Maryland + 5 more
Source: ClinicalTrials.gov public record
Updated Dec 29, 2016 · Synced Sep 27, 2026, 5:02 AM EDT
Completed Phase 4 Interventional Results available

VAccination to Improve Clinical outComes in Heart Failure Trial: a Feasibility Study (VACC-HeFT)

NCT02268500
View directory record Official record
Conditions
Chronic Heart Failure
Interventions
Influenza vaccine
Biological
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years and older
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jun 8, 2021 · Synced Sep 27, 2026, 5:02 AM EDT
Active, not recruiting Phase 1Phase 2 Interventional Accepts healthy volunteers

Study to Evaluate the Safety and the Immunogenicity of a Second Generation Structurally Designed mRNA Vaccine Candidate Against Pandemic Influenza H5 HA Strain in Healthy Adult Participants Aged 18 Years and Older

NCT06907511
View directory record Official record
Conditions
Pandemic Influenza Immunization, Healthy Volunteers
Interventions
Pandemic flu H5 HA mRNA SD2 vaccine, Placebo
Biological · Other
Lead sponsor
Sanofi
Industry
Eligibility
18 Years and older
Enrollment
720 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
13
States / cities
La Mesa, California • DeLand, Florida • Lakeland, Florida + 10 more
Source: ClinicalTrials.gov public record
Updated Jan 15, 2026 · Synced Sep 27, 2026, 5:02 AM EDT
Active, not recruiting Phase 4 Interventional Accepts healthy volunteers

Tfh Dysfunction in HIV and Aging

NCT04487041
View directory record Official record
Conditions
Human Influenza
Interventions
Standard dose influenza vaccination, High dose influenza vaccination
Biological
Lead sponsor
University of Miami
Other
Eligibility
18 Years and older
Enrollment
400 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2027
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Jul 16, 2026 · Synced Sep 27, 2026, 5:02 AM EDT