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ClinicalTrials.gov public records Last synced Sep 3, 2026, 3:46 PM EDT

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Showing 1–24 of 81 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Vaccine Compliance Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Communication Strategies to Increase HPV Vaccination Intention

NCT06784960
View directory record Official record
Conditions
Papilloma Viral Infection, Vaccine Hesitancy, Communication
Interventions
Messages
Behavioral
Lead sponsor
Abramson Cancer Center at Penn Medicine
Other
Eligibility
18 Years to 45 Years
Enrollment
5,337 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 3, 2026 · Synced Sep 3, 2026, 3:46 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Trusted Messengers: Intervention to Promote COVID-19 Vaccination

NCT04981392
View directory record Official record
Conditions
Covid19, Vaccination
Interventions
Primary care text message outreach to unvaccinated patients and resources to support PCPs
Behavioral
Lead sponsor
University of Massachusetts, Worcester
Other
Eligibility
18 Years and older
Enrollment
21,844 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 25, 2024 · Synced Sep 3, 2026, 3:46 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

ACTIVATE in Public Housing

NCT06075732
View directory record Official record
Conditions
Pneumonia, Influenza, Varicella Zoster, Meningitis, COVID-19, Vaccine Hesitancy
Interventions
Increasing Willingness and Uptake of Influenza, Pneumonia, Meningitis, HZV, and COVID-19 Vaccination
Behavioral
Lead sponsor
Charles Drew University of Medicine and Science
Other
Eligibility
18 Years and older
Enrollment
400 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Feb 16, 2025 · Synced Sep 3, 2026, 3:46 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

A Tailored, Health Communication Intervention for HPV Vaccine Hesitant Families

NCT04380623
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 Sep 3, 2026, 3:46 PM 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 Sep 3, 2026, 3:46 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Incentives & Motivation for Behavior Change:

NCT04747327
View directory record Official record
Conditions
Behavior, Intention
Interventions
mandate public, employer mandate, incentive reward, penalty, incentive lottery small, incentive lottery medium, incentive lottery large, cash small, cash medium, cash large, invitation for exercise financial incentive study, invitation for exercise social incentive study, invitation for sleep social incentive study, invitation for sleep financial incentive
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
4,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 14, 2024 · Synced Sep 3, 2026, 3:46 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Motivational Interviewing for Vaccine Uptake in Latinx Adults

NCT06062056
View directory record Official record
Conditions
Vaccine Hesitancy
Interventions
EHR alert, Motivational Interviewing, Warm hand off to nurse
Other · Behavioral
Lead sponsor
Boston College
Other
Eligibility
18 Years and older
Enrollment
3,698 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
2
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 14, 2025 · Synced Sep 3, 2026, 3:46 PM EDT
Terminated Not applicable Interventional Results available

COVID-19 Vaccine Hesitancy Counseling Intervention for Pharmacists

NCT05926544
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 Sep 3, 2026, 3:46 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Improving Vaccine Acceptance Through EHR Integrated Patient- and Provider-Facing Decision Support

NCT06482450
View directory record Official record
Conditions
Vaccine Hesitancy, Vaccine Refusal
Interventions
LetsTalkShots (patient-facing CDS), LetsTalkShots (provider-facing CDS), Appointment Reminder Message
Other
Lead sponsor
Johns Hopkins Bloomberg School of Public Health
Other
Eligibility
Not listed
Enrollment
1,200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jul 22, 2026 · Synced Sep 3, 2026, 3:46 PM EDT
Completed Not applicable Interventional Results available

System Alignment for VaccinE Delivery (SAVED): Improving Rates of Influenza and Pneumococcal Vaccination Through Patient Outreach, Improved Medical Record Accuracy and Targeted Physician Alerts

NCT02266277
View directory record Official record
Conditions
Influenza, Infections, Pneumococcal
Interventions
Arm 1: E-portal message with IVR call, Arm 2: E-portal message with no IVR call, Arm 3: No e-portal message with IVR call, Arm 5: IVR call
Other
Lead sponsor
University of Massachusetts, Worcester
Other
Eligibility
18 Years and older
Enrollment
30,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 30, 2017 · Synced Sep 3, 2026, 3:46 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Group Intervention on Vaccine Confidence

NCT05891626
View directory record Official record
Conditions
Vaccination Refusal
Interventions
Group intervention
Behavioral
Lead sponsor
MultiCare Health System Research Institute
Other
Eligibility
18 Years and older
Enrollment
429 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Puyallup, Washington
Source: ClinicalTrials.gov public record
Updated Oct 9, 2023 · Synced Sep 3, 2026, 3:46 PM EDT
Completed Not applicable Interventional Results available

Brief Digital Intervention to Increase COVID-19 Vaccination Among Individuals With Anxiety or Depression

NCT06119854
View directory record Official record
Conditions
Misinformation, Vaccine Hesitancy, Anxiety, Depression, COVID-19
Interventions
Attitudinal inoculation, Cognitive-behavioral therapy-informed intervention, Conventional public health messaging
Behavioral
Lead sponsor
City University of New York, School of Public Health
Other
Eligibility
18 Years and older
Enrollment
1,419 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Sep 10, 2025 · Synced Sep 3, 2026, 3:46 PM 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 Sep 3, 2026, 3:46 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Motivational Interviewing and Vaccine Hesitancy in Children

NCT03934008
View directory record Official record
Conditions
Vaccine Hesitancy
Interventions
MOtivational interviewing Tool to Improve Vaccine AdherencE (MOTIVE)
Other
Lead sponsor
Cedarville University
Other
Eligibility
0 Years to 6 Years
Enrollment
4,191 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Springfield, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 8, 2020 · Synced Sep 3, 2026, 3:46 PM EDT
Active, not recruiting Phase 3 Interventional Accepts healthy volunteers

PREVENT HPV -Related Cancers Trial

NCT07217145
View directory record Official record
Conditions
HPV Vaccination, Uptake Vaccination, Series Completion
Interventions
PREVENT
Behavioral
Lead sponsor
University of Utah
Other
Eligibility
18 Years and older
Enrollment
1,455 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jun 4, 2026 · Synced Sep 3, 2026, 3:46 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

COVID-19 Messaging for Vaccination

NCT05182554
View directory record Official record
Conditions
Vaccination Refusal, COVID-19 Pandemic
Interventions
Doctor Videos, Sharing Videos, Sharing Videos (Influencers), Vaccine Ambassador, Video framing, Video order
Behavioral
Lead sponsor
Massachusetts Institute of Technology
Other
Eligibility
18 Years and older
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Cambridge, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 24, 2023 · Synced Sep 3, 2026, 3:46 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Connecting Friends and Health Workers to Boost COVID-19 Vaccination in Latino Communities

NCT06128928
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 Sep 3, 2026, 3:46 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Video to Promote HPV Vaccination

NCT02196454
View directory record Official record
Conditions
Vaccine Acceptance, Social Acceptance, Acceptance Processes, Health Behavior, Human Papillomavirus
Interventions
Educational Video with Male or Female Narrator
Other
Lead sponsor
Children's Hospital of Philadelphia
Other
Eligibility
11 Years and older
Enrollment
110 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2018
U.S. locations
2
States / cities
Flourtown, Pennsylvania • Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 31, 2018 · Synced Sep 3, 2026, 3:46 PM EDT
Completed Not applicable Interventional Results available

RADx-UP Phase 3D (Oregon Saludable: Juntos Podemos)

NCT05910879
View directory record Official record
Conditions
Health Behavior, Health Care Utilization, Vaccine Hesitancy
Interventions
Self-Affirmation Implementation Intentions (SAII) Intervention, Promotores de Salud (Health Education)
Behavioral
Lead sponsor
University of Oregon
Other
Eligibility
18 Years and older
Enrollment
625 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
Eugene, Oregon
Source: ClinicalTrials.gov public record
Updated Aug 11, 2026 · Synced Sep 3, 2026, 3:46 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Vaccine Hesitancy: A Survey of Pediatric Clinicians

NCT01098825
View directory record Official record
Conditions
Vaccine Hesitancy, Vaccine Refusal
Interventions
web-based survey
Other
Lead sponsor
Children's Mercy Hospital Kansas City
Other
Eligibility
Not listed
Enrollment
1,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010
U.S. locations
1
States / cities
Kansas City, Missouri
Source: ClinicalTrials.gov public record
Updated Jun 26, 2011 · Synced Sep 3, 2026, 3:46 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

CATCH-UP Vaccines: Engaged Approaches to Testing in Community/Healthcare Settings for the Underserved (COVID-19)

NCT05236270
View directory record Official record
Conditions
COVID-19, Vaccine Refusal
Interventions
Text Message, Motivational Interviewing, Electronic Educational Message with Tailored Questions/Prompts
Behavioral
Lead sponsor
University of Oklahoma
Other
Eligibility
18 Years to 100 Years
Enrollment
312 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated May 21, 2024 · Synced Sep 3, 2026, 3:46 PM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Advancing Vaccine Equity Through Understanding Vaccine Hesitancy, Barriers, and Trust

NCT05537714
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 Sep 3, 2026, 3:46 PM 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 Sep 3, 2026, 3:46 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Improving Vaccinations for Young Children (IVY)

NCT04203277
View directory record Official record
Conditions
Vaccination Refusal
Interventions
IVY
Other
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
Not listed
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jul 23, 2026 · Synced Sep 3, 2026, 3:46 PM EDT