Independent directory Public ClinicalTrials.gov records United States
Clinical Trials Finder
Objective public record navigation
Search Results

Search by objective public record fields.

Search by query text, NCT ID, condition, intervention, sponsor, city, state, recruitment status, phase, study type, healthy volunteer eligibility, sex, or age. Results are retrieved from ClinicalTrials.gov and synchronized into the directory. Search pages remain noindex by default.

Clear filters
ClinicalTrials.gov public records Last synced Jun 11, 2026, 1:07 AM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Filters: Condition: Influenza Vaccine Effectiveness Clear all
Completed Not applicable Interventional Results available

The Respiratory Protection Effectiveness Clinical Trial

NCT01249625
View directory record Official record
Conditions
Influenza, Respiratory Syncytial Viruses, Paramyxoviridae Infections, Coronavirus, Rhinovirus
Interventions
N95 Respirator, Medical/surgical mask
Device
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 100 Years
Enrollment
2,862 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2018
U.S. locations
7
States / cities
Aurora, Colorado • Denver, Colorado • Washington D.C., District of Columbia + 3 more
Source: ClinicalTrials.gov public record
Updated Apr 24, 2019 · Synced Jun 11, 2026, 1:07 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Protective Efficacy of Flublok® Quadrivalent Versus Licensed Inactivated Influenza Vaccine in Adults ≥50 Years of Age

NCT02285998
View directory record Official record
Conditions
Influenza
Interventions
Flublok Quadrivalent Influenza Vaccine, Inactivated Influenza Vaccine
Biological
Lead sponsor
Protein Sciences Corporation
Industry
Eligibility
50 Years and older
Enrollment
9,003 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
38
States / cities
Mobile, Alabama • Tempe, Arizona • Little Rock, Arkansas + 34 more
Source: ClinicalTrials.gov public record
Updated Oct 26, 2017 · Synced Jun 11, 2026, 1:07 AM EDT
Completed Phase 3 Interventional Results available

Study to Assess Efficacy and Safety of Baloxavir Marboxil In Combination With Standard-of-Care Neuraminidase Inhibitor In Hospitalized Participants With Severe Influenza

NCT03684044
View directory record Official record
Conditions
Influenza
Interventions
Baloxavir Marboxil, Placebo
Drug · Other
Lead sponsor
Hoffmann-La Roche
Industry
Eligibility
12 Years and older
Enrollment
363 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
14
States / cities
Torrance, California • Denver, Colorado • Decatur, Georgia + 11 more
Source: ClinicalTrials.gov public record
Updated Jan 5, 2021 · Synced Jun 11, 2026, 1:07 AM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Fluad vs. Fluzone High-Dose Vaccine Effectiveness Among Adults ≥65 Years

NCT06029933
View directory record Official record
Conditions
Influenza, Community-acquired Pneumonia, Cardiovascular Events
Interventions
Adjuvanted Quadrivalent Inactivated Influenza Vaccine (aIIV4), High-Dose Quadrivalent Inactivated Influenza Vaccine (HD-IIV4)
Biological
Lead sponsor
Kaiser Permanente
Other
Eligibility
65 Years and older
Enrollment
960,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Oakland, California
Source: ClinicalTrials.gov public record
Updated Sep 7, 2023 · Synced Jun 11, 2026, 1:07 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Predict + Protect Study: Exploring the Effectiveness of a Predictive Health Education Intervention on the Adoption of Protective Behaviors Related to ILI

NCT06229444
View directory record Official record
Conditions
Influenza, Influenza A, Influenza B, COVID-19, Respiratory Syncytial Virus (RSV)
Interventions
ILI Predictive Alerts, Reactive Content, and Proactive Content, ILI Predictive Alerts, Reactive Content, Proactive Content, No Intervention
Behavioral
Lead sponsor
Evidation Health
Industry
Eligibility
18 Years and older
Enrollment
17,043 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
San Mateo, California
Source: ClinicalTrials.gov public record
Updated Sep 18, 2024 · Synced Jun 11, 2026, 1:07 AM EDT
Withdrawn Phase 2 Interventional

Assessment of Efficacy of CR8020 and CR6261, Monoclonal Antibodies, Against Influenza Infection

NCT01992276
View directory record Official record
Conditions
Influenza
Interventions
CR8020, CR6261, Placebo
Biological
Lead sponsor
Crucell Holland BV
Industry
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
21
States / cities
Fresno, California • Stanford, California • Washington D.C., District of Columbia + 18 more
Source: ClinicalTrials.gov public record
Updated Mar 3, 2014 · Synced Jun 11, 2026, 1:07 AM EDT
Completed Phase 4 Interventional Results available

Evaluating The Safety And Clinical Efficacy Of Elderberry Extract In Patients With Influenza

NCT03410862
View directory record Official record
Conditions
Influenza, Human
Interventions
Elderberry Extract, Placebos
Drug
Lead sponsor
michael macknin
Other
Eligibility
5 Years and older
Enrollment
87 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 18, 2021 · Synced Jun 11, 2026, 1:07 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

A Study to Evaluate a Modified RNA Vaccine Against Influenza in Adults 18 Years of Age or Older

NCT05540522
View directory record Official record
Conditions
Influenza, Human
Interventions
Quadrivalent influenza modRNA vaccine, Quadrivalent influenza vaccine
Biological
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older
Enrollment
45,789 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
263
States / cities
Athens, Alabama • Birmingham, Alabama • Dothan, Alabama + 192 more
Source: ClinicalTrials.gov public record
Updated May 7, 2025 · Synced Jun 11, 2026, 1:07 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 Jun 11, 2026, 1:07 AM EDT
Completed Phase 3 Interventional

Phase 3 Efficacy and Safety Study of Favipiravir for Treatment of Uncomplicated Influenza in Adults - T705US316

NCT02026349
View directory record Official record
Conditions
Influenza
Interventions
favipiravir, Placebo
Drug
Lead sponsor
MDVI, LLC
Industry
Eligibility
18 Years to 80 Years
Enrollment
860 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
60
States / cities
Birmingham, Alabama • Hunstville, Alabama • Hot Springs, Arkansas + 48 more
Source: ClinicalTrials.gov public record
Updated Nov 10, 2015 · Synced Jun 11, 2026, 1:07 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

A Study of mRNA-1010 Compared With a Licensed Influenza Vaccine in Adults ≥50 Years of Age

NCT06602024
View directory record Official record
Conditions
Seasonal Influenza
Interventions
mRNA-1010, Fluarix®, Influsplit® Tetra, Fluarix Tetra, Alpharix® Tetra
Biological
Lead sponsor
ModernaTX, Inc.
Industry
Eligibility
50 Years and older
Enrollment
40,817 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
188
States / cities
Anniston, Alabama • Athens, Alabama • Birmingham, Alabama + 150 more
Source: ClinicalTrials.gov public record
Updated Sep 9, 2025 · Synced Jun 11, 2026, 1:07 AM EDT
Terminated No phase listed Observational Accepts healthy volunteers

A Case Control Study of the Effectiveness of Q/LAIV Versus Inactivated Influenza Vaccine and No Vaccine in Subjects 2-17 Years of Age

NCT01997450
View directory record Official record
Conditions
Influenza Vaccine Effectiveness
Interventions
Not listed
Lead sponsor
MedImmune LLC
Industry
Eligibility
2 Years to 17 Years
Enrollment
4,121 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2016
U.S. locations
8
States / cities
Gainesville, Florida • Bloomington, Minnesota • Winston-Salem, North Carolina + 5 more
Source: ClinicalTrials.gov public record
Updated Mar 9, 2025 · Synced Jun 11, 2026, 1:07 AM EDT
Completed Phase 3 Interventional Results available

Study to Assess the Efficacy of Baloxavir Marboxil Versus Placebo to Reduce Onward Transmission of Influenza A or B in Households

NCT03969212
View directory record Official record
Conditions
Influenza
Interventions
Baloxavir Marboxil, Placebo
Drug
Lead sponsor
Hoffmann-La Roche
Industry
Eligibility
5 Years to 64 Years
Enrollment
4,138 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2024
U.S. locations
43
States / cities
Birmingham, Alabama • Pelham, Alabama • Phoenix, Arizona + 32 more
Source: ClinicalTrials.gov public record
Updated Jul 3, 2025 · Synced Jun 11, 2026, 1:07 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Functional Consequences of T-bet Expression in Flu-specific Memory B Cells After Live Attenuated Influenza Vaccine (LAIV)

NCT04080245
View directory record Official record
Conditions
Influenza, Human
Interventions
Treatment Group Live Attenuated Flu Vaccine (LAIV)
Biological
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years to 50 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2025
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Jun 10, 2025 · Synced Jun 11, 2026, 1:07 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Safety/Efficacy Study of Seqirus A/H7N9 IIV With or Without MF59(R) Adjuvant to Prevent Avian Influenza

NCT03682120
View directory record Official record
Conditions
Avian Influenza, Influenza Immunisation
Interventions
A/H7N9, MF59, Phosphate Buffered Saline (PBS) diluent
Biological · Drug · Other
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 64 Years
Enrollment
372 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
7
States / cities
Birmingham, Alabama • St Louis, Missouri • Cincinnati, Ohio + 4 more
Source: ClinicalTrials.gov public record
Updated May 16, 2021 · Synced Jun 11, 2026, 1:07 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Non-integrated Costs Increase Effectiveness of Incentives

NCT03507231
View directory record Official record
Conditions
Control - No Incentive for Flu Vaccine, Direct Incentive, Indirect Incentive
Interventions
Email Message, Incentive for Vaccination, Incentive for completing a short survey
Behavioral
Lead sponsor
Carnegie Mellon University
Other
Eligibility
18 Years to 100 Years
Enrollment
12,531 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated Apr 24, 2018 · Synced Jun 11, 2026, 1:07 AM EDT
Terminated Phase 2 Interventional Accepts healthy volunteers Results available

A Phase 2 Study to Evaluate the Efficacy and Safety of VIR-2482 for the Prevention of Illness Due to Influenza A

NCT05567783
View directory record Official record
Conditions
Influenza A
Interventions
VIR-2482 (450 mg), VIR-2482 (1200 mg), Placebo
Biological
Lead sponsor
Vir Biotechnology, Inc.
Industry
Eligibility
18 Years to 64 Years
Enrollment
2,977 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
51
States / cities
Anniston, Alabama • Mobile, Alabama • Tempe, Arizona + 45 more
Source: ClinicalTrials.gov public record
Updated Sep 18, 2024 · Synced Jun 11, 2026, 1:07 AM EDT
Active, not recruiting Phase 4 Interventional Accepts healthy volunteers Results available

A Pragmatic Assessment of Influenza Vaccine Effectiveness in the DoD

NCT03734237
View directory record Official record
Conditions
Influenza, Influenza-like Illness, Influenza Vaccines
Interventions
Egg based influenza vaccines, Recombinant influenza vaccines, Cell-culture based influenza vaccines
Biological
Lead sponsor
Henry M. Jackson Foundation for the Advancement of Military Medicine
Other
Eligibility
18 Years and older
Enrollment
15,448 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2026
U.S. locations
9
States / cities
San Diego, California • Annapolis, Maryland • Bethesda, Maryland + 5 more
Source: ClinicalTrials.gov public record
Updated Apr 1, 2026 · Synced Jun 11, 2026, 1:07 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Comparative Study of Influenza Vaccines in Adults, FLUVACS-year 4

NCT00538512
View directory record Official record
Conditions
Influenza
Interventions
Fluzone, Flumist, Physiologic saline
Biological · Other
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 49 Years
Enrollment
1,952 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
4
States / cities
Ann Arbor, Michigan • Kalamazoo, Michigan • Mount Pleasant, Michigan + 1 more
Source: ClinicalTrials.gov public record
Updated Dec 5, 2017 · Synced Jun 11, 2026, 1:07 AM EDT
Withdrawn Phase 3 Interventional

A Study to Evaluate the Efficacy and Safety of Intravenous Peramivir in Subjects With Uncomplicated Influenza.

NCT01224795
View directory record Official record
Conditions
Influenza
Interventions
Peramivir, Placebo Comparator
Drug
Lead sponsor
BioCryst Pharmaceuticals
Industry
Eligibility
12 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010
U.S. locations
96
States / cities
Birmingham, Alabama • Hot Springs, Arkansas • Jonesboro, Arkansas + 93 more
Source: ClinicalTrials.gov public record
Updated Jun 9, 2026 · Synced Jun 11, 2026, 1:07 AM EDT
Terminated Phase 4 Interventional Accepts healthy volunteers

Comparison of Recombinant Influenza Vaccine Versus Standard Egg-Based Inactivated Influenza Vaccine in Adults 18-64 Years

NCT05514002
View directory record Official record
Conditions
Influenza, Human
Interventions
Fluzone Quadrivalent, Flublok Quadrivalent
Biological
Lead sponsor
Fatimah Dawood
Federal
Eligibility
18 Years to 64 Years
Enrollment
3,988 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
4
States / cities
Tucson, Arizona • Tallahassee, Florida • Houston, Texas + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 23, 2025 · Synced Jun 11, 2026, 1:07 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Safety and Efficacy Study of Oral XIGO Tablets to Treat The Common Cold

NCT01092039
View directory record Official record
Conditions
Common Cold
Interventions
lactoferrin, L-Glutamine and beta-glucans, Placebo Comparator
Dietary Supplement
Lead sponsor
Xigo Health LLC
Industry
Eligibility
18 Years to 50 Years
Enrollment
140 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Fall River, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 23, 2012 · Synced Jun 11, 2026, 1:07 AM EDT
Terminated Phase 4 Interventional Accepts healthy volunteers

Th1 Response to Influenza: Aging and Vaccine Efficacy

NCT00396305
View directory record Official record
Conditions
Influenza
Interventions
Placebo, Trivalent Inactivated Influenza
Drug · Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
21 Years and older
Enrollment
41 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2008
U.S. locations
1
States / cities
Norfolk, Virginia
Source: ClinicalTrials.gov public record
Updated Aug 26, 2010 · Synced Jun 11, 2026, 1:07 AM EDT
Completed Phase 2 Interventional Results available

Immunogenicity of Fluzone High Dose in Immunocompromised Children and Young Adults

NCT01685372
View directory record Official record
Conditions
Solid Organ Transplant Recipient (Liver, Kidney, Heart), Rheumatologic Disorder, Human Immunodeficiency Virus (HIV), Bone Marrow Transplant (BMT), Dialysis
Interventions
Fluzone High Dose, Fluzone
Biological
Lead sponsor
University of Colorado, Denver
Other
Eligibility
5 Years to 35 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2017
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Jan 22, 2018 · Synced Jun 11, 2026, 1:07 AM EDT