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ClinicalTrials.gov public records Last synced Oct 1, 2026, 10:37 AM EDT

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Showing 25–48 of 156 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: High-Dose Influenza Vaccine Clear all
Completed Phase 4 Interventional Accepts healthy volunteers Results available

A Study of Fluzone® High-Dose Vaccine Compared With Fluzone® Vaccine In Elderly Adults

NCT01427309
View directory record Official record
Conditions
Influenza
Interventions
High Dose Trivalent Inactivated Influenza Vaccine, Trivalent Inactivated Influenza Vaccine
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
65 Years and older
Enrollment
31,989 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2013
U.S. locations
105
States / cities
Mobile, Alabama • Chandler, Arizona • Glendale, Arizona + 88 more
Source: ClinicalTrials.gov public record
Updated Apr 20, 2015 · Synced Oct 1, 2026, 10:37 AM EDT
Terminated Phase 2 Interventional Accepts healthy volunteers Results available

Development of Immune Globulin Treatment for Avian Flu

NCT00383071
View directory record Official record
Conditions
Infectious Diseases, Influenza, Avian Flu
Interventions
H5N1 vaccine, Apheresis
Biological · Procedure
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 59 Years
Enrollment
126 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2014
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 31, 2018 · Synced Oct 1, 2026, 10:37 AM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers

First-in-Human Study of VNT-101: Safety, Tolerability, and Pharmacokinetics

NCT07169318
View directory record Official record
Conditions
Influenza
Interventions
Placebo for VNT-101, VNT-101
Other · Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 59 Years
Enrollment
78 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated May 11, 2026 · Synced Oct 1, 2026, 10:37 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Randomized Trial of High Dose Influenza Vaccine in Long Term Care Setting

NCT01654224
View directory record Official record
Conditions
Influenza
Interventions
High Dose Inactivated Influenza Vaccine, Standard Dose Inactivated Influenza Vaccine
Biological
Lead sponsor
University of Pittsburgh
Other
Eligibility
65 Years and older
Enrollment
205 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 2, 2017 · Synced Oct 1, 2026, 10:37 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Study of CD388 for the Prevention of Influenza in Subjects Not at Risk for Influenza Complications

NCT06609460
View directory record Official record
Conditions
Influenza
Interventions
CD388 Injection, Placebo
Combination Product
Lead sponsor
Cidara Therapeutics Inc., a subsidiary of Merck & Co., Inc. (Rahway, New Jersey USA)
Industry
Eligibility
18 Years to 63 Years
Enrollment
5,071 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
56
States / cities
Anniston, Alabama • Cullman, Alabama • Tempe, Arizona + 51 more
Source: ClinicalTrials.gov public record
Updated Jun 18, 2026 · Synced Oct 1, 2026, 10:37 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

Safety, Tolerability and Immunogenicity of a Plant-made Seasonal Quadrivalent VLP Influenza Vaccine in Adults

NCT01991587
View directory record Official record
Conditions
Virus Diseases, RNA Virus Infections, Respiratory Tract Diseases, Respiratory Tract Infections
Interventions
Low dose of quadrivalent VLP vaccine, Medium dose of quadrivalent VLP vaccine, High dose of quadrivalent VLP vaccine, Placebo
Biological
Lead sponsor
Medicago
Industry
Eligibility
18 Years to 49 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Jun 11, 2020 · Synced Oct 1, 2026, 10:37 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Evaluate the Safety and Immunogenicity of a Seasonal Influenza VLP Vaccine (Recombinant) in Healthy Adults

NCT00754455
View directory record Official record
Conditions
Influenza
Interventions
Influenza VLP Vaccine (recombinant), Placebo
Biological
Lead sponsor
Novavax
Industry
Eligibility
18 Years to 49 Years
Enrollment
317 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
4
States / cities
Pembroke Pines, Florida • Kansas City, Missouri • Warwick, Rhode Island + 1 more
Source: ClinicalTrials.gov public record
Updated Jul 18, 2013 · Synced Oct 1, 2026, 10:37 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Safety Study of an Oral Vaccine to Prevent Avian Influenza

NCT01335347
View directory record Official record
Conditions
Avian Influenza, Bird Flu
Interventions
ND1.1, Placebo control
Biological
Lead sponsor
Vaxart
Industry
Eligibility
18 Years to 49 Years
Enrollment
54 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Jan 3, 2013 · Synced Oct 1, 2026, 10:37 AM EDT
Completed Phase 2 Interventional Results available

Safety and Efficacy of an H1N1 Influenza Vaccine in People With Asthma

NCT00978120
View directory record Official record
Conditions
H1N1 Influenza Virus
Interventions
H1N1 vaccine high dose, H1N1 vaccine low dose
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
12 Years and older
Enrollment
390 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
7
States / cities
Atlanta, Georgia • St Louis, Missouri • Winston-Salem, North Carolina + 4 more
Source: ClinicalTrials.gov public record
Updated Aug 10, 2012 · Synced Oct 1, 2026, 10:37 AM EDT
Not listed Phase 1 Interventional Accepts healthy volunteers

The Safety, Tolerance, and Immunogenicity of MAS-1-Adjuvanted Seasonal Inactivated Influenza Vaccine (MER4101)

NCT02500680
View directory record Official record
Conditions
Influenza, Human
Interventions
MER4101, Inactivated Influenza Vaccine
Biological
Lead sponsor
Nova Immunotherapeutics Limited
Industry
Eligibility
18 Years and older
Enrollment
102 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2020
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Sep 6, 2019 · Synced Oct 1, 2026, 10:37 AM EDT
Not listed Phase 4 Interventional Accepts healthy volunteers

Immune Response to High-Dose vs. Standard Dose Influenza Vaccine

NCT02297542
View directory record Official record
Conditions
Elderly Immune System
Interventions
Flu Vaccine
Biological
Lead sponsor
Health Sciences North Research Institute
Other
Eligibility
20 Years and older
Enrollment
85 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2019
U.S. locations
1
States / cities
Farmington, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 1, 2018 · Synced Oct 1, 2026, 10:37 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

TIV and High Dose TIV in Subjects With Rheumatoid Arthritis

NCT01436370
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
102 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2013
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Dec 24, 2014 · Synced Oct 1, 2026, 10:37 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

A Study on the Safety and Immunogenicity of Hexavalent Influenza mRNA Vaccine in Adult Participants 50 Years of Age and Older

NCT06744205
View directory record Official record
Conditions
Influenza, Healthy Volunteers
Interventions
Trivalent (TIV) messenger ribonucleic acid (mRNA) hemagglutinin (HA) Vaccine 1, TIV mRNA-neuraminidase (NA), TIV mRNA-HA Vaccine 2, Quadrivalent Influenza Standard Dose Vaccine, Quadrivalent Influenza Vaccine High Dose
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
50 Years and older
Enrollment
1,162 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
21
States / cities
Birmingham, Alabama • Mobile, Alabama • Tempe, Arizona + 18 more
Source: ClinicalTrials.gov public record
Updated Jun 9, 2026 · Synced Oct 1, 2026, 10:37 AM EDT
Completed Phase 2 Interventional

Randomized, Double-blind, Placebo Controlled Phase II Study to Examine the Effects of DAS181 in Healthy Adult Subjects With Laboratory Confirmed Influenza

NCT01037205
View directory record Official record
Conditions
Influenza
Interventions
DAS181 dry powder, formulation F02, Respitose ML006 (DMV-Fonterra)
Drug
Lead sponsor
Ansun Biopharma, Inc.
Industry
Eligibility
18 Years to 70 Years
Enrollment
264 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
42
States / cities
Carmichael, California • Chula Vista, California • La Mesa, California + 39 more
Source: ClinicalTrials.gov public record
Updated Apr 8, 2014 · Synced Oct 1, 2026, 10:37 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

A Study of 9-valent Extraintestinal Pathogenic Escherichia Coli Vaccine (ExPEC9V) and High-dose Quadrivalent Influenza Vaccine, With and Without Co-administration, in Adults Aged 65 Years or Older

NCT06134804
View directory record Official record
Conditions
Invasive Extraintestinal Pathogenic Escherichia Coli Disease (IED) Prevention
Interventions
ExPEC9V, Placebo, HD quadrivalent influenza vaccine
Biological
Lead sponsor
Janssen Research & Development, LLC
Industry
Eligibility
65 Years and older
Enrollment
959 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
24
States / cities
Huntsville, Alabama • Mobile, Alabama • San Diego, California + 19 more
Source: ClinicalTrials.gov public record
Updated Apr 3, 2026 · Synced Oct 1, 2026, 10:37 AM EDT
Completed Phase 2 Interventional Results available

Study Comparing High-Dose Flu Vaccine to Standard Vaccine in Cancer Patients Less Than 65 Receiving Chemotherapy

NCT01666782
View directory record Official record
Conditions
Cancer, Influenza Viral Infections
Interventions
Standard Trivalent Influenza Vaccine, High-Dose Influenza Vaccine
Biological
Lead sponsor
Saad Jamshed MD
Other
Eligibility
18 Years to 64 Years
Enrollment
105 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
2
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Jun 24, 2016 · Synced Oct 1, 2026, 10:37 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

A Study to Learn About Flu and COVID-19 Vaccine Responses in Healthy People

NCT06683352
View directory record Official record
Conditions
Influenza,Human, COVID-19
Interventions
Investigational Influenza Vaccine, COVID-19 Vaccine, Investigational Influenza/COVID-19 Vaccine, Licensed Influenza Vaccine 1, Licensed Influenza Vaccine 2, Placebo
Biological · Combination Product · Other
Lead sponsor
BioNTech SE
Industry
Eligibility
18 Years and older
Enrollment
1,353 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
22
States / cities
Lake Forest, California • San Diego, California • Walnut Creek, California + 17 more
Source: ClinicalTrials.gov public record
Updated Aug 19, 2026 · Synced Oct 1, 2026, 10:37 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Senescent Immunity in Elders and Vaccine Responses (SILVER)

NCT04077424
View directory record Official record
Conditions
Flu Vaccine
Interventions
Fluzone-High Dose Quadrivalent, Fluad, Flublock
Biological
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
65 Years to 125 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jul 12, 2022 · Synced Oct 1, 2026, 10:37 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Comparison of Three Licensed Influenza Vaccines

NCT03068949
View directory record Official record
Conditions
Influenza
Interventions
FluBlok, Fluzone, FluCelVax, Fluzone HD
Biological
Lead sponsor
University of Rochester
Other
Eligibility
18 Years to 49 Years
Enrollment
413 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2021
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Nov 30, 2021 · Synced Oct 1, 2026, 10:37 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Comparison of Immune Responses to Influenza Vaccine In Adults of Different Ages (SLVP015 2007-2017)

NCT01827462
View directory record Official record
Conditions
Influenza
Interventions
Trivalent, inactivated influenza vaccine (TIV), Quadrivalent, inactivated influenza vaccine (IIV4), High-Dose Trivalent, inactivated influenza vaccine (TIV High-Dose)
Biological
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 100 Years
Enrollment
136 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2017
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Jul 11, 2017 · Synced Oct 1, 2026, 10:37 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Study of the Safety and Immunogenicity of NasoVAX Extension

NCT03760549
View directory record Official record
Conditions
Influenza
Interventions
Subjects were administered NasoVAX high dose
Drug
Lead sponsor
Altimmune, Inc.
Industry
Eligibility
18 Years to 50 Years
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
1
States / cities
Rockville, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 19, 2025 · Synced Oct 1, 2026, 10:37 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Trial to Evaluate Safety and Immunogenicity of Trivalent Seasonal Influenza Virus-Like Particle (VLP) Vaccine (Recombinant)

NCT00903552
View directory record Official record
Conditions
Seasonal Influenza
Interventions
Influenza VLP Vaccine, Placebo
Biological
Lead sponsor
Novavax
Industry
Eligibility
18 Years to 49 Years
Enrollment
221 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009
U.S. locations
2
States / cities
Pembroke Pines, Florida • Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 18, 2013 · Synced Oct 1, 2026, 10:37 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Study to Evaluate the Safety and Immunogenicity of Two Doses of DCVC H1 HA mRNA-LNP in Healthy Adults

NCT05945485
View directory record Official record
Conditions
Influenza
Interventions
DCVC H1 HA mRNA vaccine, Quadrivalent Recombinant Seasonal Influenza Vaccine, Sodium Chloride, 0.9%
Biological · Other
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
2023 – 2026
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Jun 22, 2026 · Synced Oct 1, 2026, 10:37 AM EDT
Completed Phase 2 Interventional Results available

Study of Efficacy and Safety of IV VIS410 Plus Oseltamivir Versus Oseltamivir in Hospitalized Adults With Influenza A

NCT03040141
View directory record Official record
Conditions
Influenza A
Interventions
Low dose of VIS410, High dose of VIS410, Placebo
Drug
Lead sponsor
Visterra, Inc.
Industry
Eligibility
18 Years and older
Enrollment
89 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018
U.S. locations
21
States / cities
Tucson, Arizona • Stanford, California • St. Petersburg, Florida + 18 more
Source: ClinicalTrials.gov public record
Updated Dec 28, 2022 · Synced Oct 1, 2026, 10:37 AM EDT