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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Vaccine; Uptake Clear all
Terminated Not applicable Interventional

Trusted Messenger Intervention

NCT05167422
View directory record Official record
Conditions
Vaccine Hesitancy
Interventions
Trusted Messenger
Behavioral
Lead sponsor
Dartmouth-Hitchcock Medical Center
Other
Eligibility
18 Years and older
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Concord, New Hampshire
Source: ClinicalTrials.gov public record
Updated Jul 16, 2023 · Synced Jun 11, 2026, 12:17 AM 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 Jun 11, 2026, 12:17 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 Jun 11, 2026, 12:17 AM EDT
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 Jun 11, 2026, 12:17 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

PROmotion of FLU Vaccine Uptake in the Emergency Department - PROFLUVAXED

NCT05836818
View directory record Official record
Conditions
Influenza Vaccination
Interventions
Question (Q), Messaging (M)
Other
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
776 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
8
States / cities
San Francisco, California • Durham, North Carolina • Philadelphia, Pennsylvania + 2 more
Source: ClinicalTrials.gov public record
Updated May 30, 2024 · Synced Jun 11, 2026, 12:17 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effectiveness of Targeted Educational Interventions at Increasing HPV Vaccine Acceptability and Uptake

NCT03337269
View directory record Official record
Conditions
HPV-Related Cervical Carcinoma
Interventions
Educational video, Educational handout, Control
Other
Lead sponsor
University of Pennsylvania
Other
Eligibility
12 Years to 26 Years · Female only
Enrollment
256 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 10, 2018 · Synced Jun 11, 2026, 12:17 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

"Facts Tell… and With Stories Sell?" Combining Viewer-tailored Personal Human Papillomavirus (HPV) Narrative Video With HPV Vaccine Information Video to Improve HPV Vaccine Uptake

NCT06587243
View directory record Official record
Conditions
Vaccination
Interventions
Informational Animation Video, Personal Narrative Video
Behavioral
Lead sponsor
Johns Hopkins Bloomberg School of Public Health
Other
Eligibility
Not listed
Enrollment
1,100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 12, 2026 · Synced Jun 11, 2026, 12:17 AM EDT
Completed Phase 3 Interventional

Promotion of RSV Immunization Through Multiple Efforts

NCT06640868
View directory record Official record
Conditions
Pregnancy, Vaccination
Interventions
MyChart nurse message, SMFM video, Visual aid
Behavioral
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older · Female only
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 7, 2025 · Synced Jun 11, 2026, 12:17 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Vaccine Hesitancy in Black/African Americans With Rheumatic Diseases

NCT05822219
View directory record Official record
Conditions
Rheumatic Diseases, COVID-19 Vaccine, COVID-19, SLE
Interventions
COVID-19 vaccine and booster training, and importance
Behavioral
Lead sponsor
Northwestern University
Other
Eligibility
18 Years to 85 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 28, 2026 · Synced Jun 11, 2026, 12:17 AM EDT
Completed Not applicable Interventional

Engaging Practices and Communities in the Development of Interventions to Promote HPV Vaccine Uptake

NCT04279964
View directory record Official record
Conditions
Primary Prevention
Interventions
Boot Camp Translation, Control
Behavioral · Other
Lead sponsor
University of Colorado, Denver
Other
Eligibility
9 Years to 26 Years
Enrollment
2,400 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 14, 2025 · Synced Jun 11, 2026, 12:17 AM EDT
Completed Not applicable Interventional Results available

Evaluation of the Implementation and Effectiveness of IPP-HPV

NCT02994290
View directory record Official record
Conditions
HPV Vaccination
Interventions
HPV vaccine, Inpatient Postpartum HPV Immunization Quality Improvement Program
Drug · Behavioral
Lead sponsor
Yale University
Other
Eligibility
15 Years to 26 Years · Female only
Enrollment
817 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jan 8, 2023 · Synced Jun 11, 2026, 12:17 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Impact of Financial Incentives

NCT05744960
View directory record Official record
Conditions
Human Papilloma Virus
Interventions
Communication training, financial Incentive
Behavioral
Lead sponsor
UNC Lineberger Comprehensive Cancer Center
Other
Eligibility
9 Years to 12 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 4, 2026 · Synced Jun 11, 2026, 12:17 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Exploring Vaccine Confidence and Uptake of Potential COVID-19 Vaccines

NCT04731870
View directory record Official record
Conditions
Coronavirus
Interventions
Survey research
Other
Lead sponsor
East Carolina University
Other
Eligibility
18 Years to 100 Years
Enrollment
632 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Greenville, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 26, 2023 · Synced Jun 11, 2026, 12:17 AM EDT
Completed Not applicable Interventional Results available

Using Explainable AI Risk Predictions to Nudge Influenza Vaccine Uptake

NCT05009251
View directory record Official record
Conditions
Influenza, Vaccination, Health Promotion, Health Behavior, Risk Reduction
Interventions
Reminder, Risk reduction, Medical records-based recommendation, Algorithm-based recommendation
Behavioral
Lead sponsor
National Bureau of Economic Research, Inc.
Other
Eligibility
18 Years and older
Enrollment
45,061 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Danville, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 2, 2025 · Synced Jun 11, 2026, 12:17 AM 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 Jun 11, 2026, 12:17 AM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Investigating HPV Vaccination Uptake in Adults Aged 18-35 Seeking Care at a Health Clinic in Rural Mississippi

NCT05658198
View directory record Official record
Conditions
Human Papillomavirus Vaccination
Interventions
Counseling
Behavioral
Lead sponsor
Plan A Health, Inc
Other
Eligibility
18 Years to 35 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Louise, Mississippi
Source: ClinicalTrials.gov public record
Updated Nov 14, 2023 · Synced Jun 11, 2026, 12:17 AM 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 May 6, 2020 · Synced Jun 11, 2026, 12:17 AM EDT
Completed Early Phase 1 Interventional

Use of a Patient Education/Messaging Platform to Increase Uptake and Series Completion of the HPV Vaccine

NCT02546752
View directory record Official record
Conditions
Human Papilloma Virus Infection Type 11, Human Papilloma Virus Infection Type 16, Human Papilloma Virus Infection Type 18, Human Papilloma Virus Infection Type 6, Cervical Cancer
Interventions
THEO
Other
Lead sponsor
Regenstrief Institute, Inc.
Other
Eligibility
11 Years to 17 Years
Enrollment
1,306 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
5
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated May 24, 2016 · Synced Jun 11, 2026, 12:17 AM 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 Jun 11, 2026, 12:17 AM 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 Jun 11, 2026, 12:17 AM EDT
Active, not recruiting Not applicable Interventional

Provider-Focused Intervention for Maximizing HPV Vaccine Uptake in Young Cancer Survivors

NCT04469569
View directory record Official record
Conditions
Papillomavirus Vaccines
Interventions
HPV-PROTECT
Behavioral
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
9 Years and older
Enrollment
5,196 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
6
States / cities
Birmingham, Alabama • Atlanta, Georgia • Minneapolis, Minnesota + 3 more
Source: ClinicalTrials.gov public record
Updated Feb 2, 2025 · Synced Jun 11, 2026, 12:17 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Engaging Clinical Champions to Improve HPV Vaccination

NCT05736718
View directory record Official record
Conditions
Human Papilloma Virus
Interventions
Champion Announcement Approach Training, Traditional Announcement Approach Training
Behavioral
Lead sponsor
UNC Lineberger Comprehensive Cancer Center
Other
Eligibility
9 Years to 12 Years
Enrollment
47 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
2
States / cities
Chapel Hill, North Carolina • Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Mar 8, 2026 · Synced Jun 11, 2026, 12:17 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Addressing Vaccine Hesitancy and Increasing COVID-19 Vaccine Uptake Among African American Young Adults in the South

NCT05490329
View directory record Official record
Conditions
COVID-19, Vaccine Uptake
Interventions
Tough Talks COVID
Behavioral
Lead sponsor
Florida State University
Other
Eligibility
18 Years to 29 Years
Enrollment
360 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Tallahassee, Florida
Source: ClinicalTrials.gov public record
Updated Mar 27, 2025 · Synced Jun 11, 2026, 12:17 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Improving Pediatric COVID-19 Vaccine Uptake Using an mHealth Tool

NCT05386355
View directory record Official record
Conditions
COVID-19 Vaccines, Telemedicine, Vaccine Hesitancy, Pediatric ALL
Interventions
COVID-19 Vaccine Uptake App, General Health App
Behavioral · Other
Lead sponsor
IDeA States Pediatric Clinical Trials Network
Network
Eligibility
18 Years and older
Enrollment
1,934 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
15
States / cities
Little Rock, Arkansas • Wilmington, Delaware • Honolulu, Hawaii + 12 more
Source: ClinicalTrials.gov public record
Updated Mar 10, 2025 · Synced Jun 11, 2026, 12:17 AM EDT