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Showing 1–24 of 64 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Vaccine; Uptake Clear all
Completed Not applicable Interventional Results available

Behavioral Economics to Improve Flu Vaccination Using EHR Nudges

NCT06057727
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
80,039 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
2
States / cities
Philadelphia, Pennsylvania • Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Apr 26, 2025 · Synced Jun 10, 2026, 11:07 PM EDT
Completed Not applicable Interventional Results available

Views on COVID-19 and Vaccination

NCT04706403
View directory record Official record
Conditions
Covid19
Interventions
Communication from a physician about the COVID-19 Vaccine
Behavioral
Lead sponsor
University of Massachusetts, Worcester
Other
Eligibility
18 Years and older
Enrollment
756 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 23, 2022 · Synced Jun 10, 2026, 11:07 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 Jun 10, 2026, 11:07 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Can Stories Encourage the Elderly to Vaccinate? Combining Viewer-tailored Personal Narrative Videos With Informational Videos to Improve Vaccine Uptake Among Older Adults

NCT06890403
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
50 Years and older
Enrollment
6,000 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 10, 2026, 11:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Web App Technology for Boys and Parents: Improving HPV Vaccine Uptake

NCT03000998
View directory record Official record
Conditions
Human Papillomavirus Virus, HPV
Interventions
Web App Intervention Group, Usual Customary Care Group
Behavioral
Lead sponsor
Klein Buendel, Inc.
Industry
Eligibility
11 Years and older
Enrollment
432 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2022
U.S. locations
3
States / cities
Golden, Colorado • Indianapolis, Indiana • Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated Feb 5, 2023 · Synced Jun 10, 2026, 11:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Influenza and Text Messaging in Pregnancy

NCT01248520
View directory record Official record
Conditions
Pregnancy
Interventions
influenza and general health information, general health information
Other
Lead sponsor
University of Pittsburgh
Other
Eligibility
14 Years to 50 Years · Female only
Enrollment
216 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2014
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 12, 2018 · Synced Jun 10, 2026, 11:07 PM EDT
Completed Not applicable Interventional

RADx-UP- Impact of Community Health Worker Deployment

NCT05863884
View directory record Official record
Conditions
Diabetes, COVID-19, Community Health Workers, Health Behavior, Health Knowledge, Attitudes, Practice
Interventions
Impact of Community Health Worker Home Deployment on COVID-19 Vaccine Confidence and Uptake
Behavioral
Lead sponsor
Morehouse School of Medicine
Other
Eligibility
18 Years to 50 Years
Enrollment
87 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
Albany, Georgia
Source: ClinicalTrials.gov public record
Updated Jul 30, 2025 · Synced Jun 10, 2026, 11:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

The STOP-HPV Trial 1: Communication Intervention

NCT03599557
View directory record Official record
Conditions
Immunization, Vaccination
Interventions
STOP-HPV communication intervention
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
11 Years to 17 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Itasca, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 11, 2024 · Synced Jun 10, 2026, 11:07 PM EDT
Completed No phase listed Observational Results available

This Study Intends to Describe the Characteristics of Patients Given the Pfizer-BioNTech Bivalent mRNA COVID-19 Vaccine and Any Commercially Available Influenza Vaccines at the Same Time Versus at Different Times.

NCT05858450
View directory record Official record
Conditions
Influenza, Human, COVID-19
Interventions
Comirnaty, Quadrivalent Influenza Vaccine
Biological
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older
Enrollment
3,442,996 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Sep 19, 2024 · Synced Jun 10, 2026, 11:07 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 Jun 10, 2026, 11:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Increasing Vaccine Uptake Among Adolescents in the Rural South

NCT04999267
View directory record Official record
Conditions
Vaccine Hesitancy
Interventions
INVEST
Other
Lead sponsor
Duke University
Other
Eligibility
Not listed
Enrollment
2 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
2
States / cities
Durham, North Carolina • Columbia, South Carolina
Source: ClinicalTrials.gov public record
Updated Dec 9, 2025 · Synced Jun 10, 2026, 11:07 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 Jun 10, 2026, 11:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Assessment, Feedback, Incentive, Exchange (AFIX OB) A Customizable Quality Improvement Intervention to Increase Maternal Vaccine Uptake

NCT04678271
View directory record Official record
Conditions
Influenza, Whooping Cough
Interventions
AFIX-OB Quality Improvement Package
Behavioral
Lead sponsor
Yale University
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
202 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Sep 20, 2023 · Synced Jun 10, 2026, 11:07 PM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Increasing COVID-19, Influenza, and Pneumonia Vaccine Uptake

NCT04761692
View directory record Official record
Conditions
Covid19, Influenza, Pneumonia, Vaccine Refusal
Interventions
Full VEPMP Intervention, Partial VEPMP Intervention, Delayed VEPMP Intervention
Behavioral
Lead sponsor
Charles Drew University of Medicine and Science
Other
Eligibility
65 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Aug 18, 2022 · Synced Jun 10, 2026, 11:07 PM EDT
Completed No phase listed Observational

HPV Vaccine Acceptability Among Young Men Who Have Sex With Men

NCT01535794
View directory record Official record
Conditions
HPV Vaccine Attitudes, HPV Vaccine Intention
Interventions
Not listed
Lead sponsor
Indiana University
Other
Eligibility
18 Years to 26 Years · Male only
Enrollment
2,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Aug 7, 2014 · Synced Jun 10, 2026, 11:07 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 Jun 10, 2026, 11:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Boosting COVID-19 Vaccination Uptake Using Wastewater Surveillance

NCT06698497
View directory record Official record
Conditions
Vaccine Uptake
Interventions
Communication Campaign
Behavioral
Lead sponsor
Syracuse University
Other
Eligibility
Not listed
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Syracuse, New York
Source: ClinicalTrials.gov public record
Updated Sep 14, 2025 · Synced Jun 10, 2026, 11:07 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 Apr 9, 2025 · Synced Jun 10, 2026, 11:07 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 Jun 10, 2026, 11:07 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 Jun 10, 2026, 11:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Getting to Yes, Michigan! (G2YMI)

NCT05096260
View directory record Official record
Conditions
COVID-19 Vaccines, COVID-19 Pandemic
Interventions
Motivational Interviewing based SMS/MMS and web content
Behavioral
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
1,180 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Apr 30, 2026 · Synced Jun 10, 2026, 11:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Improving HPV Vaccination Rates Among Rural and Native American Adolescents

NCT03801603
View directory record Official record
Conditions
HPV Vaccinations
Interventions
HPV vaccination training and education
Behavioral
Lead sponsor
University of California, Davis
Other
Eligibility
11 Years to 17 Years
Enrollment
263 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Mar 16, 2021 · Synced Jun 10, 2026, 11:07 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 Jun 10, 2026, 11:07 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 Jun 10, 2026, 11:07 PM EDT