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ClinicalTrials.gov public records Last synced May 22, 2026, 4:11 AM EDT

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

Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Filters: Condition: Vaccination Behavior Clear all
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, 4:11 AM EDT
Completed Not applicable Interventional
View directory record Official record
Conditions
Influenza Vaccination, Health Promotion, Health Behavior, Risk Reduction
Interventions
Letter, Patient portal, SMS
Behavioral
Lead sponsor
Geisinger Clinic
Other
Eligibility
18 Years and older
Enrollment
43,225 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022
U.S. locations
1
States / cities
Danville, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 11, 2022 · Synced May 22, 2026, 4:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
HPV-Related Carcinoma
Interventions
brief negotiated mobile application
Behavioral
Lead sponsor
Boston Medical Center
Other
Eligibility
9 Years to 17 Years · Female only
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 8, 2018 · Synced May 22, 2026, 4:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available
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 May 22, 2026, 4:11 AM EDT
Completed Not applicable Interventional Results available
View directory record Official record
Conditions
Influenza
Interventions
Reminder
Behavioral
Lead sponsor
Geisinger Clinic
Other
Eligibility
18 Years and older
Enrollment
139,503 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 May 22, 2026, 4:11 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, 4:11 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, 4:11 AM EDT
Completed Not applicable Interventional Results available
View directory record Official record
Conditions
Covid19
Interventions
Philly Vax Sweepstakes
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
3,827,656 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 2, 2025 · Synced May 22, 2026, 4:11 AM EDT
Active, not recruiting Not applicable Interventional
View directory record Official record
Conditions
Influenza, Vaccination
Interventions
Behavioral economics framed test messaging
Behavioral
Lead sponsor
Kaiser Permanente
Other
Eligibility
6 Months and older
Enrollment
100,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Jan 27, 2026 · Synced May 22, 2026, 4:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Influenza, Tetanus, Diphtheria, Pertussis, Pneumonia
Interventions
Modified clinical reminders
Other
Lead sponsor
Atlanta VA Medical Center
Federal
Eligibility
Not listed
Enrollment
67,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Decatur, Georgia
Source: ClinicalTrials.gov public record
Updated Jan 9, 2020 · Synced May 22, 2026, 4:11 AM EDT
Completed No phase listed Observational
View directory record Official record
Conditions
Human Papillomavirus Vaccination
Interventions
Not listed
Lead sponsor
Indiana University
Other
Eligibility
13 Years to 17 Years
Enrollment
62 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Dec 16, 2012 · Synced May 22, 2026, 4:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available
View directory record Official record
Conditions
Cervical Cancer
Interventions
BNI-brief Negotiated Interview
Behavioral
Lead sponsor
Boston Medical Center
Other
Eligibility
11 Years to 15 Years · Female only
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 18, 2017 · Synced May 22, 2026, 4:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers
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
520,000 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 May 22, 2026, 4:11 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, 4:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available
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 May 22, 2026, 4:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers
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 May 22, 2026, 4:11 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, 4:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers
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
300,000 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 May 22, 2026, 4:11 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, 4:11 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, 4:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers
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 May 22, 2026, 4:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers
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 May 22, 2026, 4:11 AM EDT
Completed Not applicable Interventional
View directory record Official record
Conditions
Influenza, Vaccination, Health Promotion, Health Behavior, Risk Reduction
Interventions
Risk Reduction
Behavioral
Lead sponsor
Geisinger Clinic
Other
Eligibility
18 Years and older
Enrollment
40,671 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022
U.S. locations
1
States / cities
Danville, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 4, 2022 · Synced May 22, 2026, 4:11 AM EDT
Completed Not applicable Interventional
View directory record Official record
Conditions
Seasonal Influenza
Interventions
Planning Prompt, Default Appointment, Control
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
50,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 16, 2016 · Synced May 22, 2026, 4:11 AM EDT