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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Influenza, Vaccination Clear all
Completed Not applicable Interventional Accepts healthy volunteers Results available

From Innovation to Solutions: Childhood Influenza Vaccination Planning

NCT01664793
View directory record Official record
Conditions
Influenza
Interventions
4 Pillars Immunization Toolkit
Behavioral
Lead sponsor
University of Pittsburgh
Other
Eligibility
6 Months to 18 Years
Enrollment
87,665 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Nov 23, 2014 · Synced Jul 21, 2026, 8:52 PM EDT
Completed Not applicable Interventional Results available

Lottery Incentive Nudges to Increase Influenza Vaccinations

NCT05012163
View directory record Official record
Conditions
Influenza, Vaccination, Health Promotion, Health Behavior
Interventions
Reminder, Financial incentive, Lottery
Behavioral
Lead sponsor
National Bureau of Economic Research, Inc.
Other
Eligibility
18 Years and older
Enrollment
57,581 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Danville, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 29, 2024 · Synced Jul 21, 2026, 8:52 PM EDT
Terminated Phase 1 Interventional

Response to Influenza Vaccine in Patients With Non-Hematologic Malignancies Receiving Chemotherapy

NCT01695733
View directory record Official record
Conditions
Neoplasms
Interventions
trivalent influenza vaccine
Biological
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Aug 30, 2018 · Synced Jul 21, 2026, 8:52 PM EDT
Completed Not applicable Interventional Results available

High-risk Influenza Vaccine Alert

NCT05492786
View directory record Official record
Conditions
Influenza
Interventions
Alert, Salient alert features, High-risk Text, Risk factors
Behavioral
Lead sponsor
Geisinger Clinic
Other
Eligibility
18 Years and older
Enrollment
80,452 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Danville, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 29, 2024 · Synced Jul 21, 2026, 8:52 PM EDT
Completed Phase 2 Interventional

Flu Vaccine Response in Patients on Biologic Therapies

NCT03277703
View directory record Official record
Conditions
Rheumatologic Disorder, Inflammatory Bowel Diseases, Immune Complex Diseases
Interventions
Influenza vaccine
Biological
Lead sponsor
Stony Brook University
Other
Eligibility
3 Years to 22 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
East Setauket, New York
Source: ClinicalTrials.gov public record
Updated Feb 24, 2022 · Synced Jul 21, 2026, 8:52 PM 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 Jul 21, 2026, 8:52 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Combining Entertainment & Influenza Education for Pediatric Patients

NCT01788514
View directory record Official record
Conditions
Influenza
Interventions
Videogame
Other
Lead sponsor
NYU Langone Health
Other
Eligibility
8 Years to 17 Years
Enrollment
51 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Mineola, New York
Source: ClinicalTrials.gov public record
Updated Feb 5, 2019 · Synced Jul 21, 2026, 8:52 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

Study to Evaluate Safety and Immunogenicity of a Pandemic Flu H5 mRNA Vaccine in Healthy Adults Aged 18 Years and Older

NCT06727058
View directory record Official record
Conditions
Influenza Immunization
Interventions
Pandemic flu H5 mRNA vaccine, Placebo
Biological · Other
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
18 Years and older
Enrollment
276 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
14
States / cities
La Mesa, California • DeLand, Florida • Lakeland, Florida + 11 more
Source: ClinicalTrials.gov public record
Updated Apr 22, 2026 · Synced Jul 21, 2026, 8:52 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Analysis of Antigen Specific B Cell Responses to Immunization With Influenza Virus Vaccine

NCT03748524
View directory record Official record
Conditions
Immunity, Cellular
Interventions
Influenza Vaccine
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 50 Years
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2022
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jan 12, 2025 · Synced Jul 21, 2026, 8:52 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Annual Study for Collection of Serum Samples in Children and Older Adults Receiving the 2021-2022 Formulations of Fluzone Quadrivalent Vaccine and Fluzone High-Dose Quadrivalent Vaccine, Respectively

NCT05050318
View directory record Official record
Conditions
Influenza Immunization, Healthy Volunteers
Interventions
Fluzone Quadrivalent vaccine, No Preservative (0.5-mL dose), 2021-2022 formulation, Fluzone High-Dose Quadrivalent vaccine (0.7-mL dose), 2021-2022 formulation
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
6 Months and older
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
2
States / cities
Bardstown, Kentucky • Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Sep 11, 2025 · Synced Jul 21, 2026, 8:52 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Influenza Vaccination Digital Interventions for People Living With Diabetes

NCT03870997
View directory record Official record
Conditions
Diabetes
Interventions
Diabetes Digital Intervention, Generic Digital Intervention
Behavioral
Lead sponsor
Evidation Health
Industry
Eligibility
18 Years and older
Enrollment
94,321 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
San Mateo, California
Source: ClinicalTrials.gov public record
Updated Jun 8, 2020 · Synced Jul 21, 2026, 8:52 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Strengthening Intentions

NCT07222774
View directory record Official record
Conditions
Influenza Vaccination, Behavior And Behavior Mechanism
Interventions
Experimental
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
Not listed
Enrollment
350 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 29, 2025 · Synced Jul 21, 2026, 8:52 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

H3N2 M2SR in Pediatric Population

NCT03553940
View directory record Official record
Conditions
Influenza, Influenza Immunisation
Interventions
Influenza Virus Monovalent A/H3N2/Bris 10 M2SR Live Vaccine, Placebo, Quadrivalent MDCK Inactivated Influenza Vaccine
Biological · Other
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
9 Years to 17 Years
Enrollment
43 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Oct 20, 2021 · Synced Jul 21, 2026, 8:52 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

A Pilot Study of the Patterns of Cellular Gene Expression in HIV-1 Patients Following Clinical Events Which Increase Plasma Virus Concentrations

NCT00001681
View directory record Official record
Conditions
HIV Infections
Interventions
Not listed
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
Not listed
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1997 – 2000
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Jul 21, 2026, 8:52 PM EDT
Recruiting Phase 4 Interventional Accepts healthy volunteers

Characterizing the Human Airway Immune Response to FluMist Vaccination

NCT07177417
View directory record Official record
Conditions
Healthy Young Adults, Influenza Vaccines, Influenza Vaccine Response
Interventions
FluMist, inactivated influenza vaccine, bronchoscopy
Biological · Procedure
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 40 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2028
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Sep 16, 2025 · Synced Jul 21, 2026, 8:52 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Study to Assess the Safety and Immunogenicity of Monovalent mRNA NA Vaccine in Adult Participants 18 Years of Age and Older

NCT05426174
View directory record Official record
Conditions
Influenza Immunization, Healthy Volunteers
Interventions
mRNA NA vaccine, High Dose Quadrivalent Influenza Vaccine
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
18 Years and older
Enrollment
233 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
6
States / cities
Huntsville, Alabama • Phoenix, Arizona • San Diego, California + 3 more
Source: ClinicalTrials.gov public record
Updated Sep 14, 2025 · Synced Jul 21, 2026, 8:52 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Influenza Vaccine in Pediatric Transplant Subjects

NCT00133510
View directory record Official record
Conditions
Influenza
Interventions
Trivalent Subviron Influenza vaccine (Fluzone)
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
6 Months to 17 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2006
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 26, 2010 · Synced Jul 21, 2026, 8:52 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Flu Vaccine in Preventing Influenza Infection in Healthy Volunteers and in Patients Who Have Undergone Stem Cell Transplant

NCT00964821
View directory record Official record
Conditions
Chronic Myeloproliferative Disorders, Leukemia, Lymphoma, Multiple Myeloma and Plasma Cell Neoplasm, Myelodysplastic Syndromes, Myelodysplastic/Myeloproliferative Neoplasms, Nonmalignant Neoplasm
Interventions
trivalent influenza vaccine, Immunoenzyme technique, Laboratory biomarker analysis
Biological · Other
Lead sponsor
City of Hope Medical Center
Other
Eligibility
18 Years to 120 Years
Enrollment
459 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2013
U.S. locations
2
States / cities
Duarte, California • Pasadena, California
Source: ClinicalTrials.gov public record
Updated Nov 6, 2017 · Synced Jul 21, 2026, 8:52 PM EDT
Not yet recruiting Phase 4 Interventional Accepts healthy volunteers

Intranasal LAIV Mucosal Immunity Examination

NCT07093281
View directory record Official record
Conditions
Impact of Vaccination
Interventions
Live Attenuated Influenza Vaccine
Biological
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
2 Years to 89 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 18, 2025 · Synced Jul 21, 2026, 8:52 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

A Study to Evaluate the Safety and Immune Responses to Fluzone® Vaccination

NCT00743275
View directory record Official record
Conditions
Influenza
Interventions
Split, Inactivated, Trivalent Influenza vaccine (Fluzone®)
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
18 Years and older
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
Norfolk, Virginia
Source: ClinicalTrials.gov public record
Updated May 15, 2016 · Synced Jul 21, 2026, 8:52 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

PROmotion of FLU Vaccine Uptake in the Emergency Department - PROFLUVAXED

NCT05836818
View directory record Official record
Conditions
Influenza Vaccination
Interventions
Question (Q), Messaging (M)
Other
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
776 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
8
States / cities
San Francisco, California • Durham, North Carolina • Philadelphia, Pennsylvania + 2 more
Source: ClinicalTrials.gov public record
Updated May 30, 2024 · Synced Jul 21, 2026, 8:52 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Influenza Vaccination in the Emergency Department

NCT00822627
View directory record Official record
Conditions
Influenza
Interventions
Influenza Vaccination, Education and referral
Drug · Behavioral
Lead sponsor
University of Arizona
Other
Eligibility
6 Months and older
Enrollment
140 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Jan 13, 2009 · Synced Jul 21, 2026, 8:52 PM EDT
Completed Not applicable Interventional Results available

Vaccine Health Literacy Related Text Message Reminders to Increase Receipt of Second Dose of Influenza Vaccine for Young, Low Income, Urban Children

NCT01662583
View directory record Official record
Conditions
Influenza
Interventions
Text Message, Written reminder
Other
Lead sponsor
Columbia University
Other
Eligibility
6 Months to 9 Years
Enrollment
660 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 6, 2015 · Synced Jul 21, 2026, 8:52 PM EDT
Completed Not applicable Interventional

Pediatric Second Influenza Dose Portal Reminder Recall

NCT04668417
View directory record Official record
Conditions
Influenza, Respiratory Tract Infections
Interventions
Portal Reminders for Second Dose of Influenza Vaccine with Direct Scheduling Link, Portal Reminders for Second Dose of Influenza Vaccine without Direct Scheduling Link
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
6 Months to 36 Months
Enrollment
698 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 27, 2021 · Synced Jul 21, 2026, 8:52 PM EDT