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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Influenza (Healthy Volunteers) Clear all
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 9, 2020 · Synced Jun 28, 2026, 2:03 AM EDT
Completed Phase 1 Interventional

Poly-ICLC to Prevent Respiratory Viral Infections A Safety Study

NCT00646152
View directory record Official record
Conditions
Influenza, Severe Acute Respiratory Distress Syndrome, Smallpox, Ebola, Unknown Respiratory Viruses
Interventions
Poly-ICLC
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 70 Years
Enrollment
57 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 4, 2018 · Synced Jun 28, 2026, 2:03 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Safety and Immunogenicity of a Live-attenuated Universal Flu Vaccine Followed by an Inactivated Universal Flu Vaccine

NCT03300050
View directory record Official record
Conditions
Influenza, Vaccine
Interventions
cH8/1N1 LAIV, AS03-adjuvanted cH5/1N1 IIV, cH5/1N1 IIV, AS03-adjuvanted cH8/1N1 IIV, Normal saline, Phosphate buffered saline (PBS)
Biological
Lead sponsor
PATH
Other
Eligibility
18 Years to 39 Years
Enrollment
65 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
2
States / cities
Durham, North Carolina • Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 20, 2021 · Synced Jun 28, 2026, 2:03 AM EDT
Not listed Phase 1 Interventional Accepts healthy volunteers

Safety and Pharmacokinetics Study of Human Monoclonal Antibody (FGI-101-1A6)

NCT01299142
View directory record Official record
Conditions
Influenza
Interventions
FGI-101-1A6
Drug
Lead sponsor
Functional Genetics Inc.
Industry
Eligibility
18 Years to 45 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 17, 2011 · Synced Jun 28, 2026, 2:03 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Influenza Challenge Study to Determine the Optimal Infection Dose and Safety of a Recombinant H3N2 (A/Texas/71/2017 (H3N2, Clade 3C3a) Influenza Strain

NCT04978454
View directory record Official record
Conditions
Influenza
Interventions
Influenza RG-A/Texas/71/2017 (H3N2) Challenge, Placebo
Biological · Other
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 45 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
2
States / cities
Baltimore, Maryland • Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 27, 2025 · Synced Jun 28, 2026, 2:03 AM EDT
Completed Phase 1 Interventional

Phase I Open-Label Study of Recombinant DNA Plasmid Vaccine, VRC-AVIDNA036-00-VP, Encoding for Influenza Virus H5 Hemagglutinin Protein Given Intradermally

NCT00489931
View directory record Official record
Conditions
Influenza A Virus, H5N1 Subtype, Influenza A Virus, Influenzavirus A, Orthomyxovirdae, H5N1 Virus
Interventions
VRC-AVIDNA036-00-VP
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 60 Years
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Jun 28, 2026, 2:03 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Phase 1 Study of a H5N1 Influenza Vaccine (Reverse Genetic Reassortant)

NCT00783926
View directory record Official record
Conditions
Influenza, Pandemic Influenza
Interventions
H5N1 Influenza Vaccine, Whole virion, Vero cell-derived, Inactivated Influenza Vaccine, non-adjuvanted (reverse genetic reassortant/H5N1 hemagglutinin antigen)
Biological
Lead sponsor
Alachua Government Services, Inc.
Industry
Eligibility
18 Years to 45 Years
Enrollment
422 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
6
States / cities
Wichita, Kansas • Lexington, Kentucky • Kansas City, Missouri + 3 more
Source: ClinicalTrials.gov public record
Updated Oct 8, 2015 · Synced Jun 28, 2026, 2:03 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Assessment of CR8020, a Monoclonal Antibody Against Influenza A Viruses

NCT01756950
View directory record Official record
Conditions
Influenza
Interventions
2 mg/kg CR8020, 5 mg/kg CR8020, 15 mg/kg CR8020, 30 mg/kg CR8020, 50 mg/kg CR8020, Placebo
Biological
Lead sponsor
Crucell Holland BV
Industry
Eligibility
18 Years to 50 Years
Enrollment
64 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
1
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated Dec 18, 2013 · Synced Jun 28, 2026, 2:03 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Evaluation of Influenza-Specific Immune Responses in Children and Adults During the 2010-2011 Influenza Season in the U.S.

NCT01262079
View directory record Official record
Conditions
Influenza
Interventions
Not listed
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
6 Years and older
Enrollment
180 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
4
States / cities
Decatur, Georgia • St Louis, Missouri • Cincinnati, Ohio + 1 more
Source: ClinicalTrials.gov public record
Updated Aug 14, 2011 · Synced Jun 28, 2026, 2:03 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 1, 2017 · Synced Jun 28, 2026, 2:03 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

H1N1v Virus Challenge Study in Healthy Subjects

NCT04044352
View directory record Official record
Conditions
Influenza
Interventions
Influenza A/Bethesda/MM2/H1N1 Challenge
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 49 Years
Enrollment
76 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
4
States / cities
Baltimore, Maryland • St Louis, Missouri • Durham, North Carolina + 1 more
Source: ClinicalTrials.gov public record
Updated Apr 27, 2021 · Synced Jun 28, 2026, 2:03 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Revaccination With Subunit Influenza A/Vietnam/1203/2004 (H5N1) Vaccine

NCT00240903
View directory record Official record
Conditions
Influenza
Interventions
Influenza A/Vietnam/1203/2004 (H5N1; sanofi pasteur)
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 65 Years
Enrollment
37 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2006
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Aug 11, 2011 · Synced Jun 28, 2026, 2:03 AM EDT
Completed Phase 2 Interventional

Mucosal and Systemic Immunity After Viral Challenge of Healthy Volunteers Vaccinated With Inactivated Influenza Vaccine Via the Intranasal Versus Intramuscular Route

NCT03845231
View directory record Official record
Conditions
Influenza
Interventions
Flucelvax(R), Human Challenge virus
Biological · Other
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 55 Years
Enrollment
82 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 9, 2020 · Synced Jun 28, 2026, 2:03 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Immune Responses to H5N1 Vaccine With and Without AS03 Adjuvant

NCT01578317
View directory record Official record
Conditions
Influenza
Interventions
H5N1 vaccine plus AS03 adjuvant, H5N1 vaccine without adjuvant
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 45 Years
Enrollment
43 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2016
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 25, 2019 · Synced Jun 28, 2026, 2:03 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Screening for LID Clinical Studies Unit Healthy Volunteer Protocols

NCT01386424
View directory record Official record
Conditions
Zika, Influenza
Interventions
Not listed
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 65 Years
Enrollment
5,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2011
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 23, 2026 · Synced Jun 28, 2026, 2:03 AM EDT
Terminated Phase 1 Interventional Accepts healthy volunteers

Safety Study of Single Administration Intravenous Treatment for Influenza

NCT01375985
View directory record Official record
Conditions
Influenza
Interventions
AVI-7100, Placebo
Drug
Lead sponsor
Sarepta Therapeutics, Inc.
Industry
Eligibility
18 Years to 50 Years
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jun 10, 2013 · Synced Jun 28, 2026, 2:03 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

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
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
910 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
18
States / cities
Long Beach, California • San Diego, California • DeLand, Florida + 15 more
Source: ClinicalTrials.gov public record
Updated Jun 18, 2025 · Synced Jun 28, 2026, 2:03 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Immune Response Following Seasonal Influenza Vaccination

NCT03163342
View directory record Official record
Conditions
Influenza
Interventions
Licensed seasonal influenza vaccine
Biological
Lead sponsor
Altimmune, Inc.
Industry
Eligibility
18 Years to 50 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Rockville, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 25, 2019 · Synced Jun 28, 2026, 2:03 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

Trial to Demonstrate Equivalent Immunogenicity of CAIV-T and FLUMIST in Healthy Participants

NCT00192335
View directory record Official record
Conditions
Healthy
Interventions
CAIV-T, CAIVT, FluMist
Biological
Lead sponsor
MedImmune LLC
Industry
Eligibility
5 Years to 49 Years
Enrollment
890 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2005
U.S. locations
3
States / cities
Shawnee Mission, Kansas • Bardstown, Kentucky • Lake Jackson, Texas
Source: ClinicalTrials.gov public record
Updated Nov 26, 2007 · Synced Jun 28, 2026, 2:03 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Single Dose Texas 2017 (H3N2) Challenge Study

NCT06476275
View directory record Official record
Conditions
Influenza Viral Infections
Interventions
Influenza A/Texas/71/2017 (H3N2), Sham placebo
Biological
Lead sponsor
Duke University
Other
Eligibility
18 Years to 46 Years
Enrollment
33 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 25, 2025 · Synced Jun 28, 2026, 2:03 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Intracutaneous Delivery of Varied Dose Volumes of Saline

NCT01767337
View directory record Official record
Conditions
Influenza
Interventions
FLUGEN 101.2 device
Device
Lead sponsor
FluGen Inc
Industry
Eligibility
18 Years to 49 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012
U.S. locations
1
States / cities
Melbourne, Florida
Source: ClinicalTrials.gov public record
Updated Aug 1, 2017 · Synced Jun 28, 2026, 2:03 AM EDT
Completed Phase 1 Interventional

Influenza A H3N2 Human Challenge Study in Healthy Adult Volunteers

NCT02594189
View directory record Official record
Conditions
Determine Minimally to Moderately Infective Dose (MMID) of Influenza A H3N2
Interventions
Live recombinantly derived A/Bethesda/MM1/H3N2 virus
Other
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 50 Years
Enrollment
49 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 2, 2019 · Synced Jun 28, 2026, 2:03 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Protective Immunity Project 02

NCT00833651
View directory record Official record
Conditions
Kidney Transplant, Immunology, Immunosuppression
Interventions
Not listed
Lead sponsor
Emory University
Other
Eligibility
18 Years to 59 Years
Enrollment
97 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2011
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Nov 24, 2013 · Synced Jun 28, 2026, 2:03 AM 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 Jun 17, 2026 · Synced Jun 28, 2026, 2:03 AM EDT