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 Jul 21, 2026, 11:23 AM EDT

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

Showing 1–24 of 155 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Filters: Condition: Vaccination Behavior Clear all
Completed Not applicable Interventional Results available

Behavioral Economics to Improve Flu Vaccination Using EHR Nudges Replication

NCT06626321
View directory record Official record
Conditions
Behavior, Health, Flu, Flu Vaccination
Interventions
Pre-visit patient text messaging, Default pended order, Monthly peer comparison feedback, High risk bidirectional pre-visit text messaging
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
50 Years and older
Enrollment
26,248 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Lancaster, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 29, 2026 · Synced Jul 21, 2026, 11:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Interventions to Increase HBV Vaccinations in Sexually Transmitted Disease (STD) Clinics

NCT00739752
View directory record Official record
Conditions
Hepatitis B Virus
Interventions
Non-Framed-Offered, Non-Framed-Recommended, Gain-Framed-Offered, Gain-Framed-Recommended, Loss-Framed-Offered, Loss-Framed-Recommended
Behavioral
Lead sponsor
Indiana University
Other
Eligibility
18 Years and older
Enrollment
1,747 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2007
U.S. locations
2
States / cities
Chicago, Illinois • Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Nov 8, 2018 · Synced Jul 21, 2026, 11:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Evaluating a Community-Led COVID-19 Testing Intervention to Address Mistrust - Study 1

NCT06650462
View directory record Official record
Conditions
COVID-19, Trust
Interventions
Community-led discussion
Behavioral
Lead sponsor
Old Dominion University
Other
Eligibility
18 Years and older
Enrollment
57 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Norfolk, Virginia
Source: ClinicalTrials.gov public record
Updated Feb 26, 2026 · Synced Jul 21, 2026, 11:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

COVID-19 Bivalent Booster Megastudy

NCT05607082
View directory record Official record
Conditions
COVID-19
Interventions
COVID Booster text messages
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
2,600,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 2, 2023 · Synced Jul 21, 2026, 11:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Building Engagement Using Financial Incentives Trial - Colorectal Cancer Screening

NCT06124131
View directory record Official record
Conditions
Health Behavior, Colorectal Cancer, Influenza, COVID-19, Vaccine Hesitancy, Vaccine-Preventable Diseases, Healthcare Patient Acceptance
Interventions
Financial incentive for colorectal cancer screening, Financial incentive for flu shot, Financial incentive for COVID-19 shot
Behavioral
Lead sponsor
Tulane University
Other
Eligibility
45 Years to 75 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
New Orleans, Louisiana
Source: ClinicalTrials.gov public record
Updated May 3, 2025 · Synced Jul 21, 2026, 11:23 AM EDT
Completed Not applicable Interventional Results available

COVID-19 Vaccine Hesitancy Counseling Intervention for Pharmacists: A Stepped-Wedge Trial

NCT06547814
View directory record Official record
Conditions
COVID-19
Interventions
Standard implementation webinar and online training, Virtual facilitation
Behavioral
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 99 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 20, 2026 · Synced Jul 21, 2026, 11:23 AM EDT
Completed Not applicable Interventional

The Effect of a Planning Prompt on Seasonal Influenza Vaccination Rates

NCT01207232
View directory record Official record
Conditions
Seasonal Influenza
Interventions
Planning Prompt, Control Condition
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
3,272 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 21, 2010 · Synced Jul 21, 2026, 11:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

COVID-19 Vaccine Uptake Trial

NCT05419232
View directory record Official record
Conditions
Vaccination Refusal, COVID-19
Interventions
Short Message Service (SMS) + Website Link Strategy, Phone Call with Peer Strategy
Other
Lead sponsor
Washington University School of Medicine
Other
Eligibility
Not listed
Enrollment
262 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
8
States / cities
Hazelwood, Missouri • Jennings, Missouri • Saint Ann, Missouri + 2 more
Source: ClinicalTrials.gov public record
Updated Jul 20, 2026 · Synced Jul 21, 2026, 11:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Adolescent Vaccination Reminder Study

NCT01732315
View directory record Official record
Conditions
Adolescent Vaccination Status
Interventions
Email Notification
Behavioral
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years and older
Enrollment
3,783 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Aug 16, 2015 · Synced Jul 21, 2026, 11:23 AM EDT
Completed Not applicable Interventional

Text4Vax: Text Message Reminders for Pediatric COVID-19 and Influenza Vaccines 2024-25 Season

NCT06603090
View directory record Official record
Conditions
Influenza, COVID-19, Vaccination Hesitancy
Interventions
Text message influenza vaccine reminders, Text message COVID-19 vaccine reminders, Text message influenza and COVID-19 vaccine reminders
Behavioral
Lead sponsor
Columbia University
Other
Eligibility
6 Months to 17 Years
Enrollment
66,147 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
4
States / cities
Itasca, Illinois • New York, New York • Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 10, 2025 · Synced Jul 21, 2026, 11:23 AM 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, 11:23 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Trial in HPV Prevention for the U.S. Vietnamese Community

NCT07637630
View directory record Official record
Conditions
HPV-related Cancers, HPV Vaccination
Interventions
Expert Video, Self-persuasion, Narrative Storytelling, Motivational Interviewing, Constant Component
Behavioral
Lead sponsor
Northwestern University
Other
Eligibility
18 Years and older
Enrollment
96 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2029
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 10, 2026 · Synced Jul 21, 2026, 11:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Promoting Human Papillomavirus (HPV) Vaccination Through African American Beauty Salons

NCT01461408
View directory record Official record
Conditions
Human Papilloma Virus
Interventions
Health Education Session
Behavioral
Lead sponsor
MEE Productions, Inc.
Other
Eligibility
Female only
Enrollment
240 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 9, 2013 · Synced Jul 21, 2026, 11:23 AM 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, 11:23 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Safety and Effectiveness of Anti-HIV Vaccines in HIV-Negative Adults

NCT00000904
View directory record Official record
Conditions
HIV Infections
Interventions
ALVAC(2)120(B,MN)GNP (vCP1452), gp160 MN/LAI-2, ALVAC(1)120(B,MN)GNP (vCP1433), ALVAC-HIV MN120TMG (vCP205), ALVAC-RG Rabies Glycoprotein (vCP65)
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 60 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Ends 1999
U.S. locations
6
States / cities
Birmingham, Alabama • Baltimore, Maryland • St Louis, Missouri + 3 more
Source: ClinicalTrials.gov public record
Updated Nov 3, 2021 · Synced Jul 21, 2026, 11:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Educational Intervention to Improve HPV Vaccination Decision Quality

NCT02797054
View directory record Official record
Conditions
HPV Vaccination Decision Quality
Interventions
Tailored educational materials, Untailored educational materials, Usual care
Behavioral
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 75 Years
Enrollment
1,205 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Sep 20, 2018 · Synced Jul 21, 2026, 11:23 AM EDT
Completed Not applicable Interventional Results available

Use of Construal Level Theory to Inform Messaging to Increase Vaccination Against COVID-19

NCT04871776
View directory record Official record
Conditions
Covid19, Vaccine Refusal
Interventions
Messaging informed by construal level theory, Usual Care
Behavioral
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years and older
Enrollment
3,671 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 15, 2024 · Synced Jul 21, 2026, 11:23 AM 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, 11:23 AM EDT
Completed Not applicable Interventional Results available

Multilevel Interventions to Enhance Provider Recommendations for HPV Vaccination

NCT03501992
View directory record Official record
Conditions
Papillomavirus Vaccines
Interventions
Current care, Reminder-recall, Audit-and-feedback, Combined reminder-recall and audit-and-feedback
Behavioral
Lead sponsor
Mayo Clinic
Other
Eligibility
11 Years to 12 Years
Enrollment
9,242 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2023
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Oct 23, 2024 · Synced Jul 21, 2026, 11:23 AM EDT
Terminated Not applicable Interventional Results available

PROmotion of COvid-19 VA(X)Ccination in the Emergency Department - PROCOVAXED

NCT05142332
View directory record Official record
Conditions
Covid-19 Vaccine, Vaccine Hesitancy
Interventions
Covid-19 vaccine education materials
Other
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
541 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
7
States / cities
San Francisco, California • Durham, North Carolina • Philadelphia, Pennsylvania + 1 more
Source: ClinicalTrials.gov public record
Updated Dec 12, 2023 · Synced Jul 21, 2026, 11:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

SCALE-UP Utah: Community-Academic Partnership to Address COVID-19 Vaccination Rates Among Utah Community Health Centers

NCT04939519
View directory record Official record
Conditions
Covid19
Interventions
Text-Messaging (TM), Patient Navigation (PN)
Behavioral
Lead sponsor
University of Utah
Other
Eligibility
18 Years and older
Enrollment
65,300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Dec 11, 2025 · Synced Jul 21, 2026, 11:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Selah Trial of Stress Interventions for Clergy: Mindfulness Based Stress Reduction, Daily Examen, and Stress Inoculation

NCT04625777
View directory record Official record
Conditions
Occupational Stress
Interventions
Mindfulness Based Stress Reduction, Daily Examen spiritual practice, Stress inoculation combination
Behavioral
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
390 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 21, 2022 · Synced Jul 21, 2026, 11:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Increasing Vaccine Uptake Among Adolescents in the Rural South

NCT04999267
View directory record Official record
Conditions
Vaccine Hesitancy
Interventions
INVEST
Other
Lead sponsor
Duke University
Other
Eligibility
Not listed
Enrollment
2 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
2
States / cities
Durham, North Carolina • Columbia, South Carolina
Source: ClinicalTrials.gov public record
Updated Dec 9, 2025 · Synced Jul 21, 2026, 11:23 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Clinic-based HPV and COVID-19 Vaccine Promoting Intervention for AfAm Adolescents in Alabama

NCT04604743
View directory record Official record
Conditions
Vaccine Refusal
Interventions
Intervention, TBN
Behavioral
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
15 Years to 26 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Apr 5, 2023 · Synced Jul 21, 2026, 11:23 AM EDT