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ClinicalTrials.gov public records Last synced Oct 7, 2026, 7:29 AM EDT

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Showing 73–96 of 1,101 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Influenza Virus Vaccine Clear all
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 7, 2026, 7:29 AM EDT
Terminated Phase 2 Interventional Accepts healthy volunteers Results available

Phase 2 Dose and Formulation Confirmation of Quad-NIV in Older Adults

NCT03658629
View directory record Official record
Conditions
Influenza, Human
Interventions
NanoFlu (Quad-NIV), Matrix-M Adjuvant, Placebo, Fluzone HD, Flublok Quadrivalent, Influenza Vaccine
Biological · Other
Lead sponsor
Novavax
Industry
Eligibility
65 Years and older
Enrollment
1,375 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
14
States / cities
Hollywood, Florida • Savannah, Georgia • Stockbridge, Georgia + 11 more
Source: ClinicalTrials.gov public record
Updated Nov 4, 2022 · Synced Oct 7, 2026, 7:29 AM EDT
Completed No phase listed Observational

Influenza Vaccine in HIV Infection: Immune Response and Effect on Viral Load

NCT00025922
View directory record Official record
Conditions
HIV Infection
Interventions
Not listed
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
Not listed
Enrollment
240 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2003
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 4, 2008 · Synced Oct 7, 2026, 7:29 AM EDT
Completed No phase listed Observational

Natural History of Systemic and Nasal Mucosal Immunity to Influenza and SARS-CoV-2 in Adults After Vaccination

NCT04794829
View directory record Official record
Conditions
Influenza, COVID-19
Interventions
Not listed
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 120 Years
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 30, 2026 · Synced Oct 7, 2026, 7:29 AM EDT
Completed Phase 3 Interventional

Safety and Efficacy Study of Nitazoxanide in the Treatment of Acute Uncomplicated Influenza

NCT01610245
View directory record Official record
Conditions
Influenza
Interventions
Nitazoxanide, Oseltamivir, Placebo Oral Tablet, Placebo Oral Capsule
Drug
Lead sponsor
Romark Laboratories L.C.
Industry
Eligibility
13 Years to 65 Years
Enrollment
1,941 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
136
States / cities
Birmingham, Alabama • Dothan, Alabama • Hoover, Alabama + 121 more
Source: ClinicalTrials.gov public record
Updated Mar 29, 2018 · Synced Oct 7, 2026, 7:29 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Cholecalciferol and Flu Vaccine in Treating Healthy Participants

NCT01561989
View directory record Official record
Conditions
Healthy, no Evidence of Disease
Interventions
cholecalciferol, questionnaire administration, trivalent influenza vaccine
Dietary Supplement · Other · Biological
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
18 Years to 64 Years
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2015
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Mar 10, 2020 · Synced Oct 7, 2026, 7:29 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Postmarketing Safety Study of Q/LAIV in Subjects 2 Through 49 Years of Age

NCT01985997
View directory record Official record
Conditions
Observation Safety
Interventions
Not listed
Lead sponsor
MedImmune LLC
Industry
Eligibility
Not listed
Enrollment
95,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014
U.S. locations
1
States / cities
Oakland, California
Source: ClinicalTrials.gov public record
Updated Sep 7, 2016 · Synced Oct 7, 2026, 7:29 AM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers Results available

Safety and Immunogenicity of A/H1N1-SOIV (Swine Flu) Vaccine With and Without Adjuvant in Non-Elderly and Elderly Adults

NCT00973349
View directory record Official record
Conditions
Influenza
Interventions
MF59-eH1N1_f
Biological
Lead sponsor
Novartis
Industry
Eligibility
18 Years and older
Enrollment
2,719 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
20
States / cities
Miami, Florida • Lenexa, Kansas • Omaha, Nebraska + 16 more
Source: ClinicalTrials.gov public record
Updated Dec 7, 2015 · Synced Oct 7, 2026, 7:29 AM EDT
Completed Not applicable Interventional Results available

Patient Portal - Flu Reminder Recall

NCT03666026
View directory record Official record
Conditions
Influenza, Respiratory Tract Infections, Vaccines
Interventions
1 MyChart R/R, 2 MyChart R/R, 3 MyChart R/R
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
4 Months and older
Enrollment
164,205 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Nov 17, 2021 · Synced Oct 7, 2026, 7:29 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 13, 2026 · Synced Oct 7, 2026, 7:29 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A/H5N1 Virus-Like Particle Antigen Dose Ranging Study With Adjuvant 1

NCT01594320
View directory record Official record
Conditions
Influenza (Pandemic)
Interventions
Monovalent Avian Influenza VLP (H5N1), Monovalent Avian Influenza VLP (H5N1); Adjuvant, Saline placebo
Biological
Lead sponsor
Novavax
Industry
Eligibility
18 Years to 49 Years
Enrollment
333 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
5
States / cities
Anaheim, California • Miami, Florida • Pembroke Pines, Florida + 2 more
Source: ClinicalTrials.gov public record
Updated Feb 6, 2014 · Synced Oct 7, 2026, 7:29 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

VRC 309: A Multi-Center, Open-Label, Randomized Phase I Study of an Investigational Influenza DNA Vaccine Followed by 2009/2010 Seasonal Influenza Trivalent Inactivated Vaccine (TIV) Compared to Two Injections of TIV in Adults 45-70 Years

NCT00995982
View directory record Official record
Conditions
Influenza, Human
Interventions
VRC-FLUDNA056-00VP
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
45 Years to 70 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
2
States / cities
Bethesda, Maryland • Annandale, Virginia
Source: ClinicalTrials.gov public record
Updated Jul 2, 2017 · Synced Oct 7, 2026, 7:29 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Development of Childhood Anti-Influenza Immunity

NCT03673345
View directory record Official record
Conditions
Influenza, Influenza Immunisation
Interventions
Influenza Virus Quadrivalent Inactivated Vaccine
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
3 Months to 15 Years
Enrollment
125 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Mar 18, 2022 · Synced Oct 7, 2026, 7:29 AM EDT
Recruiting Phase 2 Interventional

Baloxavir and Oseltamivir for the Treatment of Severe Influenza Infection in Immunocompromised Patients

NCT04712539
View directory record Official record
Conditions
Hematopoietic and Lymphoid Cell Neoplasm, Influenza
Interventions
Baloxavir Marboxil, Oseltamivir
Drug
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
12 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2028
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 16, 2026 · Synced Oct 7, 2026, 7:29 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

Safety and Immunogenicity of FluLaval™ TR and Fluarix® (Influenza Vaccines) in Young and Older Adults

NCT00380211
View directory record Official record
Conditions
Influenza
Interventions
Influenza vaccine (A/H3N2, A/H1N1, and B strains), Fluarix
Biological
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years and older
Enrollment
660 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006
U.S. locations
6
States / cities
Miami, Florida • Lenexa, Kansas • Binghamton, New York + 3 more
Source: ClinicalTrials.gov public record
Updated Oct 7, 2016 · Synced Oct 7, 2026, 7:29 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Flu Shot Pre-visit Questionnaire

NCT05508698
View directory record Official record
Conditions
Influenza
Interventions
Precommitment Nudge, Salience
Behavioral
Lead sponsor
Geisinger Clinic
Other
Eligibility
18 Years and older
Enrollment
230,962 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Danville, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 25, 2023 · Synced Oct 7, 2026, 7:29 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Efficacy of a Plant-derived Quadrivalent Virus-like Particle (VLP) Vaccine in the Elderly

NCT03739112
View directory record Official record
Conditions
Virus Diseases, RNA Virus Infections, Respiratory Tract Diseases, Respiratory Tract Infections
Interventions
Quadrivalent VLP Vaccine, Fluarix Quadrivalent® Comparator Vaccine
Biological
Lead sponsor
Medicago
Industry
Eligibility
65 Years and older
Enrollment
12,794 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
50
States / cities
Mobile, Alabama • Tempe, Arizona • Banning, California + 42 more
Source: ClinicalTrials.gov public record
Updated Jun 23, 2023 · Synced Oct 7, 2026, 7:29 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Proteomic Profiling for Influenza Vaccination - FluMist

NCT00385281
View directory record Official record
Conditions
Influenza
Interventions
FluMist
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
21 Years to 49 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2007
U.S. locations
1
States / cities
Norfolk, Virginia
Source: ClinicalTrials.gov public record
Updated Aug 27, 2010 · Synced Oct 7, 2026, 7:29 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 10, 2025 · Synced Oct 7, 2026, 7:29 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

Study of a Combination Vaccine Comprised of Different Recombinant Spike Antigen Levels of a Matrix-M Adjuvanted Recombinant COVID-19 Vaccine and Recombinant Influenza Vaccine in Adult Participants 50 Years of Age and Older

NCT06695130
View directory record Official record
Conditions
COVID-19 Immunization, Influenza Immunization
Interventions
RIV (recombinant influenza vaccine), rC19 (dose 1), RIV + rC19 (dose 1), RIV + rC19 (dose 2), RIV + rC19 (dose 3), RIV + rC19 (dose 4), Placebo (0.9% NaCl)
Biological · Other
Lead sponsor
Sanofi
Industry
Eligibility
50 Years and older
Enrollment
980 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
12
States / cities
Phoenix, Arizona • Cerritos, California • Vista, California + 9 more
Source: ClinicalTrials.gov public record
Updated May 5, 2026 · Synced Oct 7, 2026, 7:29 AM EDT
Not listed Phase 4 Interventional

Optimizing Influenza Vaccination in Surgical Oncology Patients

NCT01698177
View directory record Official record
Conditions
Influenza
Interventions
Influenza vaccine
Biological
Lead sponsor
Stony Brook University
Other
Eligibility
18 Years and older
Enrollment
204 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
Stony Brook, New York
Source: ClinicalTrials.gov public record
Updated Apr 19, 2013 · Synced Oct 7, 2026, 7:29 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Safety and Immunogenicity of an MF59-Adjuvanted Influenza Vaccine in Older Adults

NCT04576702
View directory record Official record
Conditions
Influenza, Human
Interventions
Investigational aIIV4c, IIV4c, aIIV4, RIV4
Biological
Lead sponsor
Seqirus
Industry
Eligibility
50 Years and older
Enrollment
471 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
21
States / cities
Mobile, Alabama • Tempe, Arizona • Jacksonville, Florida + 17 more
Source: ClinicalTrials.gov public record
Updated Apr 17, 2024 · Synced Oct 7, 2026, 7:29 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 12, 2018 · Synced Oct 7, 2026, 7:29 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Study to Collect Sera for Immunogenicity Testing in Children Vaccinated With Fluzone®

NCT00836953
View directory record Official record
Conditions
Influenza
Interventions
Influenza virus vaccine (Pediatric formulation)
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
6 Months to 36 Months
Enrollment
33 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2004
U.S. locations
1
States / cities
Norfolk, Virginia
Source: ClinicalTrials.gov public record
Updated Apr 14, 2016 · Synced Oct 7, 2026, 7:29 AM EDT