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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Vaccination Behavior Clear all
Completed Not applicable Interventional Accepts healthy volunteers Results available

txt2protect: Using Text Messaging to Increase HPV Vaccination Among Young Sexual Minority Men

NCT02994108
View directory record Official record
Conditions
Human Papillomavirus
Interventions
txt2protect, Sexual Health Control
Behavioral
Lead sponsor
Northwestern University
Other
Eligibility
18 Years to 25 Years · Male only
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 19, 2020 · Synced Jul 21, 2026, 9:21 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

COVIDVaxStories: Randomized Trial to Reduce COVID-19 Vaccine Hesitancy in Populations of Color

NCT06297876
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 Jul 21, 2026, 9:21 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

VEText Message Framing and Covid-19 Vaccine Uptake Among at Risk Veterans

NCT04805931
View directory record Official record
Conditions
Covid19, Vaccine Refusal
Interventions
Behavioral economics
Behavioral
Lead sponsor
VA Puget Sound Health Care System
Federal
Eligibility
18 Years and older
Enrollment
4,311 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jun 27, 2021 · Synced Jul 21, 2026, 9:21 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Project 2VIDA! COVID-19 Vaccine Intervention Delivery for Adults in Southern California

NCT05022472
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 Jul 21, 2026, 9:21 PM EDT
Completed Not applicable Interventional

Personalized Nudging to Increase Influenza Vaccinations

NCT06566534
View directory record Official record
Conditions
Influenza, Human
Interventions
Reminder
Behavioral
Lead sponsor
Geisinger Clinic
Other
Eligibility
18 Years and older
Enrollment
77,482 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024
U.S. locations
1
States / cities
Danville, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 15, 2025 · Synced Jul 21, 2026, 9:21 PM EDT
Completed Not applicable Interventional Results available

Healthy, Immunized Communities Study

NCT03854734
View directory record Official record
Conditions
Vaccine Hesitancy, Communicable Diseases in Children
Interventions
Community Event, Educational Material
Behavioral
Lead sponsor
Milton S. Hershey Medical Center
Other
Eligibility
18 Years and older
Enrollment
148 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2023
U.S. locations
1
States / cities
Hershey, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 11, 2024 · Synced Jul 21, 2026, 9:21 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Integrating Primary & Secondary Interventions for Cervical Cancer Prevention in Primary Care Settings

NCT03033550
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 Jul 21, 2026, 9:21 PM EDT
Completed Not applicable Interventional Results available

Sleep Disruption in New Mothers: An Intervention Trial

NCT01321710
View directory record Official record
Conditions
Pregnancy, Postpartum Period, Sleep Disturbance
Interventions
Sleep hygiene, Dietary information, Acetaminophen
Behavioral · Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older · Female only
Enrollment
152 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2008
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Feb 28, 2012 · Synced Jul 21, 2026, 9:21 PM EDT
Completed Not applicable Interventional

COVID-19 Vaccination Hesitancy in Adults With Sickle Cell Disease

NCT05998824
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 Jul 21, 2026, 9:21 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Digital Applications to Monitor Novel Coronavirus Disease and Response in Colombia - Syndromic and Vaccination Surveillance

NCT05764174
View directory record Official record
Conditions
Vaccination Refusal, COVID-19
Interventions
Factual messages, Narrative message, Mixed message
Behavioral
Lead sponsor
Johns Hopkins Bloomberg School of Public Health
Other
Eligibility
18 Years and older
Enrollment
2,409 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 9, 2023 · Synced Jul 21, 2026, 9:21 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Promise Women Project

NCT05862844
View directory record Official record
Conditions
Human Papilloma Virus, Cervical Cancer
Interventions
Promise women project (Promote Cervical Cancer Prevention Methods Among Muslim Women in Virginia )
Behavioral
Lead sponsor
Mark Dignan, PhD
Other
Eligibility
18 Years and older · Female only
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
4
States / cities
Hampton, Virginia • Henrico, Virginia • Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Nov 6, 2024 · Synced Jul 21, 2026, 9:21 PM EDT
Completed Not applicable Interventional Results available

Effect of Varied Outreach Methods on Appointment Scheduling, Appointment Completion, and Receipt of COVID-19 Vaccination

NCT04904744
View directory record Official record
Conditions
Health Care Utilization, Vaccine Preventable Disease
Interventions
Low tailored message, No message, Low tailored message plus COVID-19 vaccine message
Other
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
12 Years to 17 Years
Enrollment
1,235 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Oct 27, 2024 · Synced Jul 21, 2026, 9:21 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Increasing Vaccine Uptake in Underresourced Public Housing Areas

NCT04779138
View directory record Official record
Conditions
Coronavirus, Vaccine Refusal
Interventions
Increasing Willingness and Uptake of COVID-19 Vaccination
Behavioral
Lead sponsor
Charles Drew University of Medicine and Science
Other
Eligibility
18 Years and older
Enrollment
462 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2024
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 23, 2024 · Synced Jul 21, 2026, 9:21 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 May 13, 2026 · Synced Jul 21, 2026, 9:21 PM EDT
Completed Not applicable Interventional

The Effect of Time-Slot Scheduling on Flu Vaccination Rates

NCT01206686
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 Jul 21, 2026, 9:21 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Testing a Personally Controlled Health Record to Ameliorate Influenza at MIT

NCT00531700
View directory record Official record
Conditions
Influenza
Interventions
Health messaging, Health messages
Other
Lead sponsor
Boston Children's Hospital
Other
Eligibility
18 Years and older
Enrollment
800 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2009
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 30, 2009 · Synced Jul 21, 2026, 9:21 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 Jul 21, 2026, 9:21 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 Jul 21, 2026, 9:21 PM EDT
Completed Not applicable Interventional Results available

Development and Testing of ADEPT: A Parent Decision Support for Childhood Vaccinations

NCT04496453
View directory record Official record
Conditions
Vaccine Refusal
Interventions
Childhood vaccination decision support tool
Other
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 17, 2023 · Synced Jul 21, 2026, 9:21 PM EDT
Suspended Not applicable Interventional Accepts healthy volunteers

HPV Multilevel Intervention Strategies Targeting Immunization in Community Settings (HPV MISTICS)

NCT05677360
View directory record Official record
Conditions
Human Papilloma Virus (HPV) Vaccine
Interventions
HPV MISTICS -Provider Level, HPV MISTICS - Parent Level, HPV MISTICS- HPV Vaccine Champion Level
Behavioral
Lead sponsor
H. Lee Moffitt Cancer Center and Research Institute
Other
Eligibility
18 Years and older
Enrollment
564 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Dec 9, 2025 · Synced Jul 21, 2026, 9:21 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Multilevel Intervention of COVID-19 Vaccine Uptake Among Latinos

NCT06156228
View directory record Official record
Conditions
Vaccine Hesitancy
Interventions
Multilevel Intervention
Behavioral
Lead sponsor
San Diego State University
Other
Eligibility
18 Years and older
Enrollment
238 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
2
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Jul 3, 2025 · Synced Jul 21, 2026, 9:21 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Healthcare Provider Human Papillomavirus Education and Professional Skills Intervention

NCT05120869
View directory record Official record
Conditions
Health Personnel Attitude, Health Knowledge, Attitudes, Practice
Interventions
Tailored HPV Education and Professional Skills Intervention Group, General HPV Education and Communication Skills Control Group
Behavioral
Lead sponsor
University of Texas, El Paso
Other
Eligibility
18 Years to 65 Years
Enrollment
161 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
2
States / cities
Las Cruces, New Mexico • El Paso, Texas
Source: ClinicalTrials.gov public record
Updated Jul 19, 2026 · Synced Jul 21, 2026, 9:21 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Increasing Vaccine Uptake Among Veterans at the Atlanta VA Health Care System

NCT03950986
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 Jul 21, 2026, 9:21 PM EDT
Completed Not applicable Interventional Results available

Improving COVID-19 Vaccine Uptake Among Black and Latino Youth

NCT05293392
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 Jul 21, 2026, 9:21 PM EDT