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ClinicalTrials.gov public records Last synced May 22, 2026, 1:16 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 94 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Treatment Refusal Clear all
Completed Not applicable Interventional
View directory record Official record
Conditions
Sickle Cell Disease, COVID-19 Vaccine, Vaccine Hesitancy
Interventions
SCD-specific COVID-19 vaccination information (SCVI) video
Behavioral
Lead sponsor
Duke University
Other
Eligibility
18 Years to 100 Years
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Dec 23, 2024 · Synced May 22, 2026, 1:16 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available
View directory record Official record
Conditions
Vaccine Refusal, Covid19
Interventions
COVID-19 Individual Awareness and Education., COVID-19 Community Outreach & Health Promotion., COVID-19 Individual Health Education & Linkages to Medical and Supportive Services., Pop-up community vaccination sites
Behavioral · Biological
Lead sponsor
Britt Skaathun
Other
Eligibility
16 Years to 99 Years
Enrollment
1,051 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2024
U.S. locations
6
States / cities
Chula Vista, California • San Diego, California • San Ysidro, California
Source: ClinicalTrials.gov public record
Updated Jun 5, 2025 · Synced May 22, 2026, 1:16 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Human Papilloma Virus, HPV-Related Carcinoma, Vaccine Refusal, Parents, Program, Communication
Interventions
Mobile Phone-Based Web-Page: HPV vaccine
Behavioral
Lead sponsor
Meharry Medical College
Other
Eligibility
18 Years and older
Enrollment
244 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2024
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Sep 7, 2021 · Synced May 22, 2026, 1:16 AM EDT
Terminated Not applicable Interventional Results available
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 and older
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 13, 2026 · Synced May 22, 2026, 1:16 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Vaccine-Preventable Diseases, COVID-19 Pandemic, Health-Related Behavior, Health Knowledge, Attitudes, Practice, Narration
Interventions
Baseline surveys, Digital Storytelling Intervention, Information Control Intervention
Behavioral
Lead sponsor
Arizona State University
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Jan 25, 2026 · Synced May 22, 2026, 1:16 AM EDT
Completed No phase listed Observational
View directory record Official record
Conditions
Kidney Transplantation, Treatment Refusal, Patient Compliance
Interventions
Adherence
Behavioral
Lead sponsor
State University of New York - Downstate Medical Center
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
1
States / cities
Brooklyn, New York
Source: ClinicalTrials.gov public record
Updated Apr 23, 2009 · Synced May 22, 2026, 1:16 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available
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 May 22, 2026, 1:16 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Vaccination, Vaccination Hesitancy, Vaccination Promotion, Psychological Aspects
Interventions
General Psych Trait Measure, Vaccine-Specific Psych Trait Measures
Diagnostic Test · Other
Lead sponsor
University of Iowa
Other
Eligibility
18 Years and older
Enrollment
1,786 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Sep 15, 2025 · Synced May 22, 2026, 1:16 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Feeding and Eating Disorders of Childhood
Interventions
Technology Supported Manual
Behavioral
Lead sponsor
Emory University
Other
Eligibility
12 Months to 6 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Mar 16, 2015 · Synced May 22, 2026, 1:16 AM EDT
Suspended Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
COVID-19, Vaccine Hesitancy
Interventions
Health Communication, Health Communication + Structural
Behavioral
Lead sponsor
Marc Kiviniemi
Other
Eligibility
18 Years to 99 Years
Enrollment
2,250 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Hazard, Kentucky
Source: ClinicalTrials.gov public record
Updated Feb 19, 2026 · Synced May 22, 2026, 1:16 AM EDT
Completed Not applicable Interventional
View directory record Official record
Conditions
Vaccine Refusal, Vaccine-Preventable Diseases, Physician-Patient Relations
Interventions
Immersive resident education, Standardized patient (SP) encounter
Other
Lead sponsor
Corewell Health East
Other
Eligibility
18 Years and older
Enrollment
112 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Royal Oak, Michigan
Source: ClinicalTrials.gov public record
Updated Jan 21, 2026 · Synced May 22, 2026, 1:16 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available
View directory record Official record
Conditions
Vaccine Refusal
Interventions
educational intervention
Behavioral
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
Not listed
Enrollment
510 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 11, 2024 · Synced May 22, 2026, 1:16 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available
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 Apr 9, 2025 · Synced May 22, 2026, 1:16 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
COVID-19, Vaccine
Interventions
REDES, Control
Behavioral
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Enrollment
900 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 11, 2025 · Synced May 22, 2026, 1:16 AM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available
View directory record Official record
Conditions
HIV Infections, Adolescent Development, Care Eliciting Behavior, Patient Non-Compliance, Patient Refusal of Treatment
Interventions
Competency: 12-Item Motivational Interviewing (MI) Coach Rating Scale (CRS), Randomized Guided Development of COPs with an internal facilitator after one year of implementation., CoP development without internal facilitation.
Behavioral
Lead sponsor
Florida State University
Other
Eligibility
18 Years to 65 Years
Enrollment
188 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2021
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Jan 14, 2025 · Synced May 22, 2026, 1:16 AM EDT
Completed Not applicable Interventional Results available
View directory record Official record
Conditions
COVID-19
Interventions
Culturally-Tailored COVID-19 Vaccine Uptake Intervention, Standard Care
Behavioral
Lead sponsor
Nemours Children's Health System
Other
Eligibility
Not listed
Enrollment
5,792 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022
U.S. locations
1
States / cities
Wilmington, Delaware
Source: ClinicalTrials.gov public record
Updated Sep 27, 2023 · Synced May 22, 2026, 1:16 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers
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 May 22, 2026, 1:16 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
COVID-19, Vaccine Hesitancy
Interventions
Vaccine Norms Feedback, Alcohol Norms Feedback
Behavioral
Lead sponsor
University of Washington
Other
Eligibility
18 Years to 24 Years
Enrollment
600 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Mar 27, 2023 · Synced May 22, 2026, 1:16 AM EDT
Recruiting Not applicable Interventional
View directory record Official record
Conditions
Suicidal Ideation, Treatment Refusal, Emotion Regulation
Interventions
Crisis Response Planning and Lethal Means Safety Counseling
Behavioral
Lead sponsor
Ohio State University
Other
Eligibility
18 Years and older
Enrollment
334 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 18, 2026 · Synced May 22, 2026, 1:16 AM EDT
Not listed No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
Decision Making, Life Experiences
Interventions
Demographic Data, Interview
Other
Lead sponsor
University of Washington
Other
Eligibility
18 Years to 80 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2018
U.S. locations
1
States / cities
Tacoma, Washington
Source: ClinicalTrials.gov public record
Updated May 29, 2017 · Synced May 22, 2026, 1:16 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Vaccine Hesitancy
Interventions
Storytelling, Learn More (Active Comparator)
Behavioral
Lead sponsor
University of Massachusetts, Worcester
Other
Eligibility
18 Years to 105 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 3, 2024 · Synced May 22, 2026, 1:16 AM EDT
Not listed No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
Vaccine Hesitancy, Structural Barriers, Vaccine Trust
Interventions
Qualitative interviews/focus groups
Behavioral
Lead sponsor
East Carolina University
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Greenville, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 27, 2023 · Synced May 22, 2026, 1:16 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers
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 May 22, 2026, 1:16 AM EDT
Completed No phase listed Observational
View directory record Official record
Conditions
Chronic Respiratory Failure, Tracheostomy Complication, Mechanical Ventilation Complication
Interventions
COVID 19 vaccine counseling
Behavioral
Lead sponsor
Northwell Health
Other
Eligibility
Up to 21 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Lake Success, New York
Source: ClinicalTrials.gov public record
Updated Jul 17, 2022 · Synced May 22, 2026, 1:16 AM EDT