- Conditions
- Vaccination Refusal, Communication
- Interventions
- Social Proof, Reframing, Scarcity Message
- Behavioral
- Lead sponsor
- Geisinger Clinic
- Other
- Eligibility
- Not listed
- Enrollment
- 9,566 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2021
- U.S. locations
- 1
- States / cities
- Danville, Pennsylvania
Search Results
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Search by query text, NCT ID, condition, intervention, sponsor, city, state, recruitment status, phase, study type, healthy volunteer eligibility, sex, or age. Results are retrieved from ClinicalTrials.gov and synchronized into the directory. Search pages remain noindex by default.
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Showing 25–48
of 24
matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
- 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
- Conditions
- HPV, Vaccine-Preventable Diseases
- Interventions
- vaccination game
- Behavioral
- Lead sponsor
- Michigan State University
- Other
- Eligibility
- 11 Years to 14 Years
- Enrollment
- 180 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2025 – 2027
- U.S. locations
- 1
- States / cities
- Chandler, Arizona
- Conditions
- COVID-19
- Interventions
- COVID Booster text messages
- Behavioral
- Lead sponsor
- University of Pennsylvania
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 2,600,000 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2022 – 2023
- U.S. locations
- 1
- States / cities
- Philadelphia, Pennsylvania
- Conditions
- HPV Infection, Vaccine-Preventable Diseases
- Interventions
- HPV game
- Behavioral
- Lead sponsor
- Michigan State University
- Other
- Eligibility
- 11 Years to 14 Years
- Enrollment
- 133 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2024 – 2026
- U.S. locations
- 1
- States / cities
- East Lansing, Michigan
- Conditions
- Human Papillomavirus Infection
- Interventions
- Communication Intervention, Communication Skills Training, Healthcare Activity, Survey Administration
- Other · Behavioral
- Lead sponsor
- Fred Hutchinson Cancer Center
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 42 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2021 – 2023
- U.S. locations
- 1
- States / cities
- Seattle, Washington
- Conditions
- Influenza
- Interventions
- Text Message, automated call
- Other
- Lead sponsor
- Columbia University
- Other
- Eligibility
- 6 Months to 50 Years
- Enrollment
- 30,537 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2010 – 2012
- U.S. locations
- 1
- States / cities
- New York, New York
- Conditions
- Covid19, Vaccination
- Interventions
- Primary care text message outreach to unvaccinated patients and resources to support PCPs
- Behavioral
- Lead sponsor
- University of Massachusetts, Worcester
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 21,844 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2022 – 2023
- U.S. locations
- 1
- States / cities
- Worcester, Massachusetts
- Conditions
- Vaccine Acceptance, Social Acceptance, Acceptance Processes, Health Behavior, Human Papillomavirus
- Interventions
- Educational Video with Male or Female Narrator
- Other
- Lead sponsor
- Children's Hospital of Philadelphia
- Other
- Eligibility
- 11 Years and older
- Enrollment
- 110 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2014 – 2018
- U.S. locations
- 2
- States / cities
- Flourtown, Pennsylvania • Philadelphia, Pennsylvania
- Conditions
- COVID-19
- Interventions
- COVID Booster text messages
- Behavioral
- Lead sponsor
- University of Pennsylvania
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 520,000 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2022 – 2023
- U.S. locations
- 1
- States / cities
- Philadelphia, Pennsylvania
- 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
- Conditions
- Immunization Programs
- Interventions
- Reminder
- Behavioral
- Lead sponsor
- Geisinger Clinic
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 1,186 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2022
- U.S. locations
- 1
- States / cities
- Danville, Pennsylvania
- Conditions
- COVID-19
- Interventions
- COVID Booster text messages
- Behavioral
- Lead sponsor
- University of Pennsylvania
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 520,000 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2022 – 2023
- U.S. locations
- 1
- States / cities
- Philadelphia, Pennsylvania
- 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
- Conditions
- COVID-19
- Interventions
- COVID Booster text messages
- Behavioral
- Lead sponsor
- University of Pennsylvania
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 520,000 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2022 – 2023
- U.S. locations
- 1
- States / cities
- Philadelphia, Pennsylvania
- Conditions
- COVID-19
- Interventions
- COVID Booster text messages
- Behavioral
- Lead sponsor
- University of Pennsylvania
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 520,000 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2022 – 2023
- U.S. locations
- 1
- States / cities
- Philadelphia, Pennsylvania
- Conditions
- COVID-19
- Interventions
- COVID Booster text messages
- Behavioral
- Lead sponsor
- University of Pennsylvania
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 300,000 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2022 – 2023
- U.S. locations
- 1
- States / cities
- Philadelphia, Pennsylvania
- Conditions
- Human Papillomavirus Infection
- Interventions
- Enhancing Accessibility to Health Care, Informational Intervention, Interview, Questionnaire Administration
- Other
- Lead sponsor
- M.D. Anderson Cancer Center
- Other
- Eligibility
- 18 Years to 26 Years
- Enrollment
- 1,200 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2021 – 2026
- U.S. locations
- 1
- States / cities
- Houston, Texas
- Conditions
- Pandemics
- Interventions
- ECA-ACE Vaccination Promotion Intervention
- Behavioral
- Lead sponsor
- Northeastern University
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 600 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2022 – 2025
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- Conditions
- Influenza, Vaccination, Risk Reduction, Health Behavior, Health Promotion
- Interventions
- Risk reduction
- Behavioral
- Lead sponsor
- Geisinger Clinic
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 51,215 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2026
- U.S. locations
- 1
- States / cities
- Danville, Pennsylvania
- Conditions
- Vaccination Hesitancy
- Interventions
- Standard MI, Intensive MI, MOTIVACC, Ecological momentary assessment (EMA) messages
- Behavioral
- Lead sponsor
- Oklahoma State University
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 60 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2024 – 2025
- U.S. locations
- 2
- States / cities
- Oklahoma City, Oklahoma • Stillwater, Oklahoma
- Conditions
- Influenza, Human
- Interventions
- Flu shot text messages
- Behavioral
- Lead sponsor
- University of Pennsylvania
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 74,811 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2020 – 2021
- U.S. locations
- 2
- States / cities
- Danville, Pennsylvania • Philadelphia, Pennsylvania
- Conditions
- Influenza, Human
- Interventions
- Reminder
- Behavioral
- Lead sponsor
- Geisinger Clinic
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 77,482 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2024
- U.S. locations
- 1
- States / cities
- Danville, Pennsylvania
- Conditions
- Covid19, Vaccines
- Interventions
- Patient MyChart Scheduling Link, Patient Educational Video, Enhanced Follow through Message
- Behavioral
- Lead sponsor
- University of California, Los Angeles
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 200,000 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2021 – 2022
- U.S. locations
- 1
- States / cities
- Westwood, Los Angeles, California