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ClinicalTrials.gov public records Last synced Oct 29, 2026, 4:07 AM EDT

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Showing 1–24 of 31 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Impact of Vaccination Clear all
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Impact of SC vs IM Administration of DENVax (TDV) on Safety and Immunogenicity

NCT01728792
View directory record Official record
Conditions
Dengue Fever
Interventions
TDV
Biological
Lead sponsor
Takeda
Industry
Eligibility
18 Years to 45 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
1
States / cities
Syracuse, New York
Source: ClinicalTrials.gov public record
Updated Jul 18, 2019 · Synced Oct 29, 2026, 4:07 AM 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
2027 – 2029
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 3, 2026 · Synced Oct 29, 2026, 4:07 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

A Study to Compare the Impact of a School Based HPV Program on Vaccination Uptake and Completion Rates

NCT01526551
View directory record Official record
Conditions
Human Papillomavirus
Interventions
HPV Vaccine and HPV-related Health Education, Reduction of barriers
Other
Lead sponsor
Lake Cumberland District Health Department
Other
Eligibility
12 Years to 20 Years
Enrollment
935 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
2
States / cities
Monticello, Kentucky
Source: ClinicalTrials.gov public record
Updated Mar 6, 2015 · Synced Oct 29, 2026, 4:07 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Enhancing a Sustainable Pharmacy-based Immunization Program in Two States

NCT02615470
View directory record Official record
Conditions
Herpes Zoster, Pneumococcal Infections
Interventions
Enhanced immunization delivery model, Immunization update
Behavioral · Other
Lead sponsor
Auburn University
Other
Eligibility
18 Years and older
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
2
States / cities
Auburn, Alabama • Claremont, California
Source: ClinicalTrials.gov public record
Updated Aug 20, 2019 · Synced Oct 29, 2026, 4:07 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Quality Improvement Strategies to Increase Human Papillomavirus (HPV) Vaccination

NCT03442062
View directory record Official record
Conditions
Human Papillomavirus Infection
Interventions
Assessment Feedback Incentives and eXchange, Physician-to-physician engagement, Active Intervention Control
Other
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
Not listed
Enrollment
264 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
3
States / cities
Phoenix, Arizona • Albany, New York • Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated May 11, 2020 · Synced Oct 29, 2026, 4:07 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Video Messages and Vaccination Intention

NCT04979416
View directory record Official record
Conditions
COVID-19 Vaccination
Interventions
Video messages
Behavioral
Lead sponsor
University of Southern California
Other
Eligibility
18 Years and older
Enrollment
1,001 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Dec 10, 2021 · Synced Oct 29, 2026, 4:07 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

RSV F Vaccine Maternal Immunization Study in Healthy Third-trimester Pregnant Women.

NCT02247726
View directory record Official record
Conditions
Respiratory Syncytial Virus Infections
Interventions
Saline Placebo (0.5mL injection), RSV F vaccine (0.5mL injection)
Drug
Lead sponsor
Novavax
Industry
Eligibility
18 Years to 40 Years · Female only
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
7
States / cities
Nampa, Idaho • Hutchinson, Kansas • Kansas City, Kansas + 4 more
Source: ClinicalTrials.gov public record
Updated May 27, 2022 · Synced Oct 29, 2026, 4:07 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Impact of High Dietary Fiber on Microbiome and Vaccine Responses

NCT05565586
View directory record Official record
Conditions
Influenza
Interventions
High-Fiber Diet (HFD), Prebiotic Food-Enriched Diet (PreFED)
Dietary Supplement
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
31 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2029
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Aug 14, 2026 · Synced Oct 29, 2026, 4:07 AM EDT
Completed Not applicable Interventional Results available

Study to Evaluate Impact of School-based Influenza Vaccination on School Populations

NCT00844051
View directory record Official record
Conditions
Influenza
Interventions
School-based influenza vaccination program
Biological
Lead sponsor
Children's Hospital Los Angeles
Other
Eligibility
4 Years to 18 Years
Enrollment
4,455 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
2
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Sep 12, 2016 · Synced Oct 29, 2026, 4:07 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

A Study to Evaluate Community-Based Measures to Increase RSV Vaccine Use Among Latino Adults

NCT07171164
View directory record Official record
Conditions
Older Adults Without Any Specific Clinical Condition, Social Networks, RSV Immunization, Vaccine Uptake
Interventions
Motivate Aim: CHW text message reminders and counseling, Motivate Aim: CHW text message reminders only, Activate Aim: CHW text message reminders and counseling, Activate Aim: CHW text message reminders only
Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
750 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2028
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Sep 30, 2025 · Synced Oct 29, 2026, 4:07 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Salud en Mis Manos - Breast and Cervical Cancer Prevention and Early Detection - Expansion 2

NCT06082882
View directory record Official record
Conditions
Breast Cancer, Cervical Cancer
Interventions
Education, Navigation to clinic
Behavioral
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
18 Years to 74 Years · Female only
Enrollment
8,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2025
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Dec 12, 2024 · Synced Oct 29, 2026, 4:07 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

COVID Booster in Pregnancy and Lactation

NCT05543993
View directory record Official record
Conditions
COVID-19
Interventions
Bivalent COVID-19 Booster
Drug
Lead sponsor
Thomas Jefferson University
Other
Eligibility
13 Years to 55 Years · Female only
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 2, 2025 · Synced Oct 29, 2026, 4:07 AM EDT
Completed No phase listed Observational Results available

The Impact of Vaccination on Severity of Illness in COVID-19

NCT04912700
View directory record Official record
Conditions
Covid19
Interventions
COVID-19 vaccine
Biological
Lead sponsor
Corewell Health East
Other
Eligibility
18 Years and older
Enrollment
11,834 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
Royal Oak, Michigan
Source: ClinicalTrials.gov public record
Updated Sep 30, 2021 · Synced Oct 29, 2026, 4:07 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Impact of LA-CEAL HALT COVID-19 Ambassador Program on Likelihood to Vaccinate

NCT04930965
View directory record Official record
Conditions
Covid19, Vaccine Refusal
Interventions
Community health worker engagement
Behavioral
Lead sponsor
Tulane University
Other
Eligibility
18 Years and older
Enrollment
56 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
New Orleans, Louisiana
Source: ClinicalTrials.gov public record
Updated Jan 18, 2024 · Synced Oct 29, 2026, 4:07 AM EDT
Active, not recruiting Not applicable Interventional

Impact of Standing Orders Optimization

NCT05742386
View directory record Official record
Conditions
Human Papilloma Virus
Interventions
Communication training, Communication training enhanced with standing orders optimization
Behavioral
Lead sponsor
UNC Lineberger Comprehensive Cancer Center
Other
Eligibility
9 Years to 12 Years
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 21, 2026 · Synced Oct 29, 2026, 4:07 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Vanderbilt Pertussis Exposure Study: PEP in Vaccinated Healthcare Workers Following Pertussis Exposure

NCT00469274
View directory record Official record
Conditions
Pertussis
Interventions
Antibiotic PEP
Drug
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years to 64 Years
Enrollment
1,102 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2009
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 29, 2013 · Synced Oct 29, 2026, 4:07 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Salud en Mis Manos - Breast and Cervical Cancer Prevention and Early Detection - Expansion 1

NCT06082505
View directory record Official record
Conditions
Cervical Cancer, Breast Cancer
Interventions
Education, Navigation to clinic
Behavioral
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
21 Years and older · Female only
Enrollment
8,262 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Dec 1, 2023 · Synced Oct 29, 2026, 4:07 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Financial Incentives

NCT05744960
View directory record Official record
Conditions
Human Papilloma Virus
Interventions
Communication training, financial Incentive
Behavioral
Lead sponsor
UNC Lineberger Comprehensive Cancer Center
Other
Eligibility
9 Years to 12 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 30, 2026 · Synced Oct 29, 2026, 4:07 AM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Impact of Vaccination on Th2 Immunity in Infancy

NCT02213341
View directory record Official record
Conditions
Food Hypersensitivity
Interventions
Skin prick allergen test, Blood draw
Procedure
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
5 Months to 7 Months
Enrollment
77 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jul 23, 2019 · Synced Oct 29, 2026, 4:07 AM EDT
Completed Not applicable Interventional

Impact of Influenza Vaccination in Pregnancy Video Education

NCT02151201
View directory record Official record
Conditions
Influenza
Interventions
Influenza vaccination video education, Hand washing video education
Behavioral
Lead sponsor
The Cleveland Clinic
Other
Eligibility
Female only
Enrollment
105 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 2, 2014 · Synced Oct 29, 2026, 4:07 AM EDT
Completed Early Phase 1 Interventional

Safety and Efficacy of ProQuad® in Children 6-24 Month Being Evaluated for Solid Organ Transplant

NCT02687763
View directory record Official record
Conditions
RENAL INSUFFICIENCY, CHRONIC, LIVER FAILURE, ACUTE, HEART DISEASE
Interventions
ProQuad
Biological
Lead sponsor
Medical University of South Carolina
Other
Eligibility
6 Months to 24 Months
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Feb 12, 2019 · Synced Oct 29, 2026, 4:07 AM EDT
Completed Phase 1 Interventional

A Phase I Study to Evaluate the Immunologic Response and Virologic Impact of AGS-004

NCT02042248
View directory record Official record
Conditions
HIV
Interventions
AGS-004
Biological
Lead sponsor
Cynthia L Gay, MD
Other
Eligibility
18 Years to 65 Years
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated May 4, 2017 · Synced Oct 29, 2026, 4:07 AM EDT
Terminated Phase 4 Interventional Results available

The Impact of Imprinting and Repeated Influenza Vaccination on Adaptive Immunity, Transcriptomics, and Metabolomics

NCT03686514
View directory record Official record
Conditions
Influenza
Interventions
FLUARIX QUADRIVALENT
Biological
Lead sponsor
Emory University
Other
Eligibility
42 Years to 71 Years
Enrollment
39 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jul 13, 2022 · Synced Oct 29, 2026, 4:07 AM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

Assessing Choice in the Employer Setting (ACES) Study

NCT00808808
View directory record Official record
Conditions
Healthy
Interventions
Choice of TIV or FluMist with baseline advertisement, Choice of TIV or FluMist with enhanced advertisement and incentives, Control - Usual care offering TIV only with baseline advertisement
Biological · Other
Lead sponsor
MedImmune LLC
Industry
Eligibility
18 Years and older
Enrollment
4,411 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
47
States / cities
Chatsworth, California • Novato, California • Sacramento, California + 34 more
Source: ClinicalTrials.gov public record
Updated Nov 20, 2013 · Synced Oct 29, 2026, 4:07 AM EDT