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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Uptake Vaccination Clear all
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 22, 2026, 3:59 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

COVID-19 Vaccine Uptake Trial

NCT05419232
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 Jul 20, 2026 · Synced Jul 22, 2026, 3:59 PM 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 Jul 22, 2026, 3:59 PM 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 Jul 22, 2026, 3:59 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

PREVENT Pilot HPV - Related Cancers Trial

NCT06738355
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
335 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jun 4, 2026 · Synced Jul 22, 2026, 3:59 PM 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 Jul 22, 2026, 3:59 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Conectados: Social Networks and Social Media for Vaccine Uptake

NCT07096245
View directory record Official record
Conditions
Vaccination
Interventions
Vaccine Information Video Dissemination
Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
507 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Mar 5, 2026 · Synced Jul 22, 2026, 3:59 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

I Vaccinate: Testing Multi-Level Interventions to Improve HPV Vaccination

NCT04452526
View directory record Official record
Conditions
Cervical Carcinoma, Human Papillomavirus-Related Malignant Neoplasm
Interventions
Best Practice, Educational Intervention, Questionnaire Administration, Reminder
Other
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
11 Years and older
Enrollment
372 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2027
U.S. locations
4
States / cities
Lexington, Kentucky • Columbus, Ohio • Charlottesville, Virginia + 1 more
Source: ClinicalTrials.gov public record
Updated Jun 14, 2026 · Synced Jul 22, 2026, 3:59 PM EDT
Completed Not applicable Interventional

Wastewater Surveillance to Boost COVID-19 Vaccine Uptake

NCT05766189
View directory record Official record
Conditions
Vaccination, Wastewater Surveillance
Interventions
Wastewater vaccine prompts
Behavioral
Lead sponsor
Syracuse University
Other
Eligibility
Not listed
Enrollment
100,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
Syracuse, New York
Source: ClinicalTrials.gov public record
Updated Jan 13, 2026 · Synced Jul 22, 2026, 3:59 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Efficacy Trial of a Brief Parent-Based Adolescent Sexual Health Intervention

NCT02600884
View directory record Official record
Conditions
Increase HPV Vaccination Uptake, Delay Sexual Debut
Interventions
Families Talking Together Plus (FTT+HPV), Brief motivational interviewing (BMI)
Behavioral
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
11 Years and older
Enrollment
1,183 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2019
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Nov 2, 2023 · Synced Jul 22, 2026, 3:59 PM EDT
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 Jul 22, 2026, 3:59 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Girls OnGuard: HPV Vaccination Uptake Among African American Adolescent Females

NCT00813319
View directory record Official record
Conditions
Vaccination
Interventions
Girls OnGuard
Behavioral
Lead sponsor
Emory University
Other
Eligibility
13 Years to 18 Years · Female only
Enrollment
216 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2014
U.S. locations
2
States / cities
Atlanta, Georgia • Decatur, Georgia
Source: ClinicalTrials.gov public record
Updated Aug 11, 2014 · Synced Jul 22, 2026, 3:59 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

SCALE-UP Utah: Community-Academic Partnership to Address COVID-19 Vaccination Rates Among Utah Community Health Centers

NCT04939519
View directory record Official record
Conditions
Covid19
Interventions
Text-Messaging (TM), Patient Navigation (PN)
Behavioral
Lead sponsor
University of Utah
Other
Eligibility
18 Years and older
Enrollment
65,300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Dec 11, 2025 · Synced Jul 22, 2026, 3:59 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 22, 2026, 3:59 PM 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 Jul 22, 2026, 3:59 PM 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 Jul 22, 2026, 3:59 PM EDT
Completed Not applicable Interventional Results available

COVID-19 Vaccine Text Outreach

NCT04834726
View directory record Official record
Conditions
Covid19
Interventions
Opt-In (Call-Back), Opt-in (In-Bound), Standard Message, Clinician Endorsement, Scarcity, Opt-Out Framing, Phone Call
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
16 Years and older
Enrollment
19,554 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 26, 2023 · Synced Jul 22, 2026, 3:59 PM 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 Jul 22, 2026, 3:59 PM 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 Jul 22, 2026, 3:59 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Promoting Altruism to Enhance Vaccine Acceptance

NCT04568590
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 Jul 22, 2026, 3:59 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 22, 2026, 3:59 PM 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 Jul 22, 2026, 3:59 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Multicomponent Clinic-based Intervention to Promote COVID-19 Vaccine Intention and Uptake Among Diverse Youth and Adolescents

NCT05722652
View directory record Official record
Conditions
COVID-19 Vaccination
Interventions
CONFIDENCE
Behavioral
Lead sponsor
University of Massachusetts, Worcester
Other
Eligibility
18 Years and older
Enrollment
667 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 13, 2025 · Synced Jul 22, 2026, 3:59 PM EDT
Completed Not applicable Interventional

Increasing Human Papillomavirus Vaccine Uptake in Low-Income, Ethnic Minority Adolescents in Los Angeles County

NCT02067507
View directory record Official record
Conditions
Human Papilloma Virus Infection
Interventions
Tailored education and referral, Staff training and patient reminders, Clinic-level reminder systems
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
9 Years to 70 Years
Enrollment
53,414 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2019
U.S. locations
2
States / cities
Alhambra, California • San Fernando, California
Source: ClinicalTrials.gov public record
Updated Oct 24, 2019 · Synced Jul 22, 2026, 3:59 PM EDT