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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
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 Jul 23, 2026, 2:08 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

PREVENT HPV-Related Cancers - BootCamp Translation

NCT06290206
View directory record Official record
Conditions
HPV Vaccination, Vaccine; Uptake, Vaccination; Series Completion
Interventions
PREVENT - BCT
Behavioral
Lead sponsor
University of Utah
Other
Eligibility
18 Years and older
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated May 17, 2025 · Synced Jul 23, 2026, 2:08 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 Jul 23, 2026, 2:08 AM 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 Jul 23, 2026, 2:08 AM 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 23, 2026, 2:08 AM 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 Jul 23, 2026, 2:08 AM 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 23, 2026, 2:08 AM 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 Jul 23, 2026, 2:08 AM EDT
Enrolling by invitation Not applicable Interventional

Patient-Centered Practical Vaccine Talk For Busy Clinicians

NCT07651761
View directory record Official record
Conditions
Influenza, COVID-19
Interventions
Provider communication training
Other
Lead sponsor
University of Massachusetts, Worcester
Other
Eligibility
18 Years and older
Enrollment
24,500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 28, 2026 · Synced Jul 23, 2026, 2:08 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 Jul 23, 2026, 2:08 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 Jul 23, 2026, 2:08 AM 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 23, 2026, 2:08 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 Jul 23, 2026, 2:08 AM 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 23, 2026, 2:08 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

COVID-19 Testing and Vaccine Literacy for Women With Criminal Legal System Involvement

NCT05582746
View directory record Official record
Conditions
COVID-19 Pandemic
Interventions
Tri-City COVID Attitudes Study
Behavioral
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
18 Years and older · Female only
Enrollment
295 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Jan 29, 2025 · Synced Jul 23, 2026, 2:08 AM 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 Jul 23, 2026, 2:08 AM 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 23, 2026, 2:08 AM 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 23, 2026, 2:08 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 Jul 23, 2026, 2:08 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 Jul 23, 2026, 2:08 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 Jul 23, 2026, 2:08 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Information Provision and Consistency Framing to Increase COVID-19 Booster Uptake

NCT05586178
View directory record Official record
Conditions
COVID-19, Vaccines
Interventions
Reminder that facilitates action, Consistency framing, Information provision about the uniqueness of the bivalent booster, Information provision about bivalent booster eligibility, Information provision about the severity of COVID-19 symptoms
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years and older
Enrollment
177,720 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Dec 4, 2024 · Synced Jul 23, 2026, 2:08 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 Jul 23, 2026, 2:08 AM 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 23, 2026, 2:08 AM EDT