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ClinicalTrials.gov public records Last synced Oct 22, 2026, 8:41 PM EDT

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Showing 721–744 of 1,140 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Flu Clear all
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of Probiotics (L. Helveticus, B. Longum, and B. Bifidum) on Immune Function and Digestive Health

NCT01709825
View directory record Official record
Conditions
Healthy
Interventions
Probiotic- Bifidobacterium Bifidum, Sugar Pill, Probiotic- Lactobacillus helveticus, Probiotic- Bifidobacterium longum ss. Infantis R0033
Dietary Supplement
Lead sponsor
University of Florida
Other
Eligibility
18 Years and older
Enrollment
583 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jan 29, 2015 · Synced Oct 22, 2026, 8:41 PM 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 22, 2026, 8:41 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Evaluation of Anti-Hemagglutinin (Anti-HA) Antibodies as Protection From the Flu in Healthy People

NCT01971255
View directory record Official record
Conditions
Influenza
Interventions
Ca/04/2009/H1N1r Challenge Virus
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 50 Years
Enrollment
74 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 24, 2017 · Synced Oct 22, 2026, 8:41 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Safety and Immunogenicity of the World Health Organization (WHO) Formulation of the 2004-2005 Fluzone® Vaccine

NCT00831987
View directory record Official record
Conditions
Influenza
Interventions
Fluzone®: Influenza virus vaccine 2004-2005 formulation
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
18 Years and older
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2006
U.S. locations
1
States / cities
Norfolk, Virginia
Source: ClinicalTrials.gov public record
Updated Apr 14, 2016 · Synced Oct 22, 2026, 8:41 PM EDT
Terminated Phase 4 Interventional Accepts healthy volunteers Results available

Adaptive Immune Responses and Repertoire in Influenza Vaccination and Infection (SLVP031)

NCT03028987
View directory record Official record
Conditions
Influenza
Interventions
Fluzone®, FluMist®
Biological
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 49 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Sep 12, 2017 · Synced Oct 22, 2026, 8:41 PM EDT
Not listed Phase 4 Interventional Accepts healthy volunteers

Influenza Vaccine as a Novel Experimental Model of the Behavioral Immune Response in Depression

NCT03756246
View directory record Official record
Conditions
Depression, Healthy
Interventions
Influenza Vaccine
Biological
Lead sponsor
University of Texas at Austin
Other
Eligibility
18 Years to 60 Years
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Jun 27, 2019 · Synced Oct 22, 2026, 8:41 PM 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 6, 2017 · Synced Oct 22, 2026, 8:41 PM EDT
Recruiting No phase listed Observational

Response to Influenza Vaccination in Pediatric Oncology Patients

NCT05384288
View directory record Official record
Conditions
Hematologic Malignancy, Pediatric Cancer, Transplant-Related Cancer
Interventions
Not listed
Lead sponsor
St. Jude Children's Research Hospital
Other
Eligibility
Up to 18 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2029
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Jun 12, 2026 · Synced Oct 22, 2026, 8:41 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Phase IV Trial to Collect Safety Data and Sera for Immunogenicity Testing in Healthy Children Given Fluzone® Vaccine

NCT00561002
View directory record Official record
Conditions
Influenza
Interventions
2007-2008 Influenza Virus Vaccine
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
6 Months to 35 Months
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
1
States / cities
Norfolk, Virginia
Source: ClinicalTrials.gov public record
Updated Apr 14, 2016 · Synced Oct 22, 2026, 8:41 PM EDT
Enrolling by invitation No phase listed Observational Accepts healthy volunteers

Long-term Observation of Hemagglutinin and Neuraminidase Inhibition Antibody Titers After Influenza Challenge

NCT02511002
View directory record Official record
Conditions
Post Influenza
Interventions
Not listed
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 120 Years
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2027
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 22, 2026 · Synced Oct 22, 2026, 8:41 PM EDT
Completed Phase 2 Interventional Results available

A Study to Evaluate the Pharmacokinetics, Safety, and Antiviral Activity of JNJ-63623872 in Combination With Oseltamivir in Adult, and Elderly Hospitalized Participants With Influenza A Infection

NCT02532283
View directory record Official record
Conditions
Influenza A Virus
Interventions
JNJ-63623872, Placebo, Oseltamivir
Drug
Lead sponsor
Janssen Research & Development, LLC
Industry
Eligibility
18 Years to 85 Years
Enrollment
102 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
14
States / cities
Fresno, California • Long Beach, California • Stanford, California + 11 more
Source: ClinicalTrials.gov public record
Updated Mar 27, 2020 · Synced Oct 22, 2026, 8:41 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Panblok H7 Vaccine Adjuvanted With AS03 or MF59

NCT03283319
View directory record Official record
Conditions
Influenza, Human
Interventions
3.75 ug Panblok H7, 7.5 ug Panblok H7, 15 ug Panblok H7, MF59, AS03
Biological
Lead sponsor
Biomedical Advanced Research and Development Authority
Federal
Eligibility
18 Years to 49 Years
Enrollment
366 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
4
States / cities
Lenexa, Kansas • Wichita, Kansas • Lexington, Kentucky + 1 more
Source: ClinicalTrials.gov public record
Updated May 6, 2020 · Synced Oct 22, 2026, 8:41 PM 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 22, 2026, 8:41 PM EDT
Completed Not applicable Interventional

Fever and Wheezing Events in Children After US Influenza Vaccines Using Text Messaging

NCT02295007
View directory record Official record
Conditions
Fever, Wheezing
Interventions
text message
Behavioral
Lead sponsor
Columbia University
Other
Eligibility
2 Years to 11 Years
Enrollment
266 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
3
States / cities
Atlanta, Georgia • Boston, Massachusetts • New York, New York
Source: ClinicalTrials.gov public record
Updated May 12, 2016 · Synced Oct 22, 2026, 8:41 PM EDT
Completed No phase listed Observational

Clinical Performance Study of the Ultra Influenza A&B Test Using Nasal Swabs for Identifying Subjects Who Are Infected With the Influenza Virus Strain Type A or Type B

NCT01753531
View directory record Official record
Conditions
Influenza, Human
Interventions
Flu Symptoms
Device
Lead sponsor
Sekisui Diagnostics, LLC
Industry
Eligibility
3 Months and older
Enrollment
677 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
3
States / cities
Winston-Salem, North Carolina • Charleston, South Carolina • New Braunfels, Texas
Source: ClinicalTrials.gov public record
Updated Jun 24, 2013 · Synced Oct 22, 2026, 8:41 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

A Study to Evaluate the Safety, Reactogenicity, and Immunogenicity of mRNA-1010 in Healthy Adults

NCT05606965
View directory record Official record
Conditions
Influenza
Interventions
mRNA-1010, Egg-based Quadrivalent Influenza Vaccine, Adjuvanted Quadrivalent Influenza Vaccine, Inactivated Influenza Vaccine, mRNA-1345, mRNA-1045
Biological
Lead sponsor
ModernaTX, Inc.
Industry
Eligibility
18 Years to 80 Years
Enrollment
172 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Nov 24, 2025 · Synced Oct 22, 2026, 8:41 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Comparison of One Versus Two Doses of Influenza Vaccine in Children 5-8 Years of Age

NCT00158665
View directory record Official record
Conditions
Influenza
Interventions
2 0.5 ml doses of '04-05 Trivalent Influenza Vaccine
Biological
Lead sponsor
Kaiser Permanente
Other
Eligibility
5 Years to 8 Years
Enrollment
280 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Oct 13, 2017 · Synced Oct 22, 2026, 8:41 PM EDT
Completed No phase listed Observational

Performance Evaluation of LumiraDx SARS-CoV-2, Flu A/B, and RSV Tests for COVID-19 Assessment

NCT05268939
View directory record Official record
Conditions
COVID-19, Influenza A, Influenza Type B, RSV Infection
Interventions
LumiraDx SARS-CoV-2 & Flu A/B test, LumiraDx SARS-CoV-2 & RSV test
Diagnostic Test
Lead sponsor
LumiraDx UK Limited
Industry
Eligibility
Not listed
Enrollment
589 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
8
States / cities
Cullman, Alabama • Encinitas, California • Miami, Florida + 5 more
Source: ClinicalTrials.gov public record
Updated Jun 15, 2026 · Synced Oct 22, 2026, 8:41 PM EDT
Completed No phase listed Observational

Cellular and Molecular Characterization of the Immune Response in Healthy NIH Employees atBaseline, and After Immunization With the H1N1 or Seasonal Influenza Vaccines

NCT01191853
View directory record Official record
Conditions
Healthy Volunteers, Influenza
Interventions
Not listed
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
18 Years and older
Enrollment
203 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2009
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 18, 2026 · Synced Oct 22, 2026, 8:41 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Immunogenicity of Influenza Vaccinations

NCT06518577
View directory record Official record
Conditions
Influenza
Interventions
Flucelvax® (ccIIV3), Flublok® (RIV3)
Biological
Lead sponsor
Duke University
Other
Eligibility
18 Years to 64 Years
Enrollment
606 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
7
States / cities
Phoenix, Arizona • Tempe, Arizona • Atlanta, Georgia + 3 more
Source: ClinicalTrials.gov public record
Updated Jul 28, 2026 · Synced Oct 22, 2026, 8:41 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

A Study to Investigate the Safety and Immunogenicity of the Quadrivalent Influenza mRNA Vaccines in Adults Aged 18 Years and Above

NCT06361875
View directory record Official record
Conditions
Influenza Immunization, Healthy Volunteers
Interventions
Quadrivalent Influenza mRNA Vaccine MRT5421, Quadrivalent Influenza mRNA Vaccine MRT5424, Quadrivalent Influenza mRNA Vaccine MRT5429, Quadrivalent Influenza Standard Dose Vaccine, Quadrivalent Influenza High-Dose Vaccine, Quadrivalent Recombinant Influenza Vaccine
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
18 Years and older
Enrollment
908 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
11
States / cities
San Diego, California • Hialeah, Florida • Hollywood, Florida + 8 more
Source: ClinicalTrials.gov public record
Updated Aug 4, 2026 · Synced Oct 22, 2026, 8:41 PM EDT
Recruiting Early Phase 1 Interventional

A Phase 0 Window of Opportunity Trial of Intratumoral Seasonal Influenza Immunization in Cutaneous Squamous Cell Carcinoma (CSCC) Patients Awaiting Curative Excision

NCT06664151
View directory record Official record
Conditions
Skin Cancer, Cutaneous Squamous Cell Carcinoma (CSCC), Cutaneous Squamous Cell Cancer
Interventions
Fluzone Trivalent
Biological
Lead sponsor
Dana-Farber Cancer Institute
Other
Eligibility
18 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
2
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 19, 2026 · Synced Oct 22, 2026, 8:41 PM EDT
Not listed Phase 4 Interventional Accepts healthy volunteers

Effect of Influenza Vaccination on Donor Egg Recipient Outcomes

NCT02946177
View directory record Official record
Conditions
Infertility, Recurrent Miscarriage
Interventions
Influenza Vaccine, Sterile Saline
Biological · Other
Lead sponsor
Center for Human Reproduction
Other
Eligibility
21 Years to 45 Years · Female only
Enrollment
126 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2021
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 18, 2020 · Synced Oct 22, 2026, 8:41 PM 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 17, 2026 · Synced Oct 22, 2026, 8:41 PM EDT