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Showing 1–16 of 16 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Incentive for Vaccination Clear all
Completed Not applicable Interventional Accepts healthy volunteers

COVID-19 Booster Incentives

NCT05648773
View directory record Official record
Conditions
Booster Message, Booster Message + Financial Incentive
Interventions
Messaging, Financial Incentive, Placebo
Behavioral · Other
Lead sponsor
University of Southern California
Other
Eligibility
18 Years and older
Enrollment
57,893 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Martinez, California
Source: ClinicalTrials.gov public record
Updated Aug 13, 2023 · Synced Sep 2, 2026, 10:15 AM EDT
Completed Not applicable Interventional Results available

Lottery Incentive Nudges to Increase Influenza Vaccinations

NCT05012163
View directory record Official record
Conditions
Influenza, Vaccination, Health Promotion, Health Behavior
Interventions
Reminder, Financial incentive, Lottery
Behavioral
Lead sponsor
National Bureau of Economic Research, Inc.
Other
Eligibility
18 Years and older
Enrollment
57,581 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Danville, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 29, 2024 · Synced Sep 2, 2026, 10:15 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Improving Pneumococcal Vaccination Rates in an Ambulatory Pre-surgical Testing Setting

NCT01787838
View directory record Official record
Conditions
Community Acquired Pneumonia
Interventions
Focused Health Education
Other
Lead sponsor
Carilion Clinic
Other
Eligibility
18 Years to 110 Years
Enrollment
2,509 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Roanoke, Virginia
Source: ClinicalTrials.gov public record
Updated Jul 18, 2017 · Synced Sep 2, 2026, 10:15 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Motivation, Syringe Exchange, and COVID-19

NCT05534061
View directory record Official record
Conditions
COVID-19 Pandemic
Interventions
Connect2Test
Behavioral
Lead sponsor
University of Oregon
Other
Eligibility
18 Years and older
Enrollment
349 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Eugene, Oregon
Source: ClinicalTrials.gov public record
Updated Feb 27, 2024 · Synced Sep 2, 2026, 10:15 AM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Maximizing HPV Vaccination: Real-time Reminders, Guidance, and Recommendations - Part 4: Feasibility Trial

NCT03429413
View directory record Official record
Conditions
Human Papillomavirus (HPV) Vaccines
Interventions
Protect Me 4 Application + External Quality Improvement Support, Protect Me 4 Application Alone
Behavioral
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 99 Years
Enrollment
1,296 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Aug 16, 2025 · Synced Sep 2, 2026, 10:15 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 Sep 2, 2026, 10:15 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Non-integrated Costs Increase Effectiveness of Incentives

NCT03507231
View directory record Official record
Conditions
Control - No Incentive for Flu Vaccine, Direct Incentive, Indirect Incentive
Interventions
Email Message, Incentive for Vaccination, Incentive for completing a short survey
Behavioral
Lead sponsor
Carnegie Mellon University
Other
Eligibility
18 Years to 100 Years
Enrollment
12,531 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated Apr 24, 2018 · Synced Sep 2, 2026, 10:15 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Incentives & Motivation for Behavior Change:

NCT04747327
View directory record Official record
Conditions
Behavior, Intention
Interventions
mandate public, employer mandate, incentive reward, penalty, incentive lottery small, incentive lottery medium, incentive lottery large, cash small, cash medium, cash large, invitation for exercise financial incentive study, invitation for exercise social incentive study, invitation for sleep social incentive study, invitation for sleep financial incentive
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
4,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 14, 2024 · Synced Sep 2, 2026, 10:15 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 Sep 2, 2026, 10:15 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

P3+ Intervention Phase

NCT02898688
View directory record Official record
Conditions
Vaccination
Interventions
Control Site, Intervention Site, Patient-level Control Group, Patient-level Intervention Group
Behavioral
Lead sponsor
Emory University
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
2,200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2020
U.S. locations
23
States / cities
Aurora, Colorado • Boulder, Colorado • Denver, Colorado + 12 more
Source: ClinicalTrials.gov public record
Updated Aug 4, 2020 · Synced Sep 2, 2026, 10:15 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Investigating the Effectiveness of a Seasonal Influenza Vaccination Promotion Campaign for Members of a Non-Profit, Community-Based Health Insurance Plan: 2018-2019

NCT03700281
View directory record Official record
Conditions
Influenza, Vaccination
Interventions
Messaging, Incentive
Behavioral
Lead sponsor
The University of Texas Health Science Center at Tyler
Other
Eligibility
18 Years and older
Enrollment
22,584 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Apr 22, 2019 · Synced Sep 2, 2026, 10:15 AM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

Assessing Choice in the Employer Setting (ACES) Study

NCT00808808
View directory record Official record
Conditions
Healthy
Interventions
Choice of TIV or FluMist with baseline advertisement, Choice of TIV or FluMist with enhanced advertisement and incentives, Control - Usual care offering TIV only with baseline advertisement
Biological · Other
Lead sponsor
MedImmune LLC
Industry
Eligibility
18 Years and older
Enrollment
4,411 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
47
States / cities
Chatsworth, California • Novato, California • Sacramento, California + 34 more
Source: ClinicalTrials.gov public record
Updated Nov 19, 2013 · Synced Sep 2, 2026, 10:15 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Incentives for Influenza Vaccination

NCT06300242
View directory record Official record
Conditions
Influenza Vaccination
Interventions
Reminders, Financial Incentive, Placebo
Behavioral · Other
Lead sponsor
University of Southern California
Other
Eligibility
18 Years and older
Enrollment
69,972 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Martinez, California
Source: ClinicalTrials.gov public record
Updated May 12, 2024 · Synced Sep 2, 2026, 10:15 AM EDT
Completed Not applicable Interventional Results available

COVID-19 Vaccination Take-Up

NCT04867174
View directory record Official record
Conditions
Covid19, Vaccination
Interventions
Financial incentives, Convenient scheduling link, Race concordant, Gender concordant
Behavioral
Lead sponsor
National Bureau of Economic Research, Inc.
Other
Eligibility
18 Years and older
Enrollment
2,701 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Martinez, California
Source: ClinicalTrials.gov public record
Updated Mar 27, 2024 · Synced Sep 2, 2026, 10:15 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

AFIX to Improve HPV Vaccination

NCT02370459
View directory record Official record
Conditions
Papillomavirus Vaccines, Adolescent Health Services
Interventions
AFIX in-person consultation, AFIX webinar consultation
Other
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
Not listed
Enrollment
223 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
4
States / cities
Springfield, Illinois • Lansing, Michigan • Chapel Hill, North Carolina + 1 more
Source: ClinicalTrials.gov public record
Updated Feb 23, 2017 · Synced Sep 2, 2026, 10:15 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Promoting Flu Vaccination Through a Mobile Wellness Program

NCT02908893
View directory record Official record
Conditions
Not Condition-specific
Interventions
In-app and push notification mobile messages
Behavioral
Lead sponsor
Evidation Health
Industry
Eligibility
18 Years to 65 Years
Enrollment
77,983 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Santa Barbara, California
Source: ClinicalTrials.gov public record
Updated Oct 20, 2016 · Synced Sep 2, 2026, 10:15 AM EDT