- Conditions
- Influenza Vaccination, Health Promotion, Health Behavior, Risk Reduction
- Interventions
- Letter, Patient portal, SMS
- Behavioral
- Lead sponsor
- Geisinger Clinic
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 43,225 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2022
- U.S. locations
- 1
- States / cities
- Danville, Pennsylvania
Search Results
Search by objective public record fields.
Search by query text, NCT ID, condition, intervention, sponsor, city, state, recruitment status, phase, study type, healthy volunteer eligibility, sex, or age. Results come from ClinicalTrials.gov. When the live registry is unavailable, a clearly labeled stored copy may be shown.
These results were retrieved from the live ClinicalTrials.gov registry. Filters and sort order apply to this result list.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Showing 1–16
of 16
matching trials from the live ClinicalTrials.gov search.
- 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
- Covid-19 Vaccination
- Interventions
- Vaccine choice message, Vaccine choice + platform-framed message, Vaccine choice + HCP trust-framed message, Vaccine choice + reactogenicity-framed message
- Behavioral
- Lead sponsor
- Kaiser Permanente
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 1,300,000 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2026 – 2027
- U.S. locations
- 1
- States / cities
- Pasadena, California
- Conditions
- Influenza, Vaccination, Health Promotion, Health Behavior, Risk Reduction
- Interventions
- Risk reduction, Medical records-based recommendation, Algorithm-based recommendation
- Behavioral
- Lead sponsor
- Geisinger Clinic
- Other
- Eligibility
- 17 Years and older
- Enrollment
- 117,649 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2020 – 2021
- U.S. locations
- 1
- States / cities
- Danville, Pennsylvania
- Conditions
- HPV Vaccination, Uptake Vaccination, Series Completion
- Interventions
- PREVENT
- Behavioral
- Lead sponsor
- University of Utah
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 1,455 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2025 – 2027
- U.S. locations
- 1
- States / cities
- Seattle, Washington
- Conditions
- Immunization Rate
- Interventions
- Text Message Reminder/Recall, Parent Preference
- Behavioral
- Lead sponsor
- University of Colorado, Denver
- Other
- Eligibility
- 11 Years to 17 Years
- Enrollment
- 34,581 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2012 – 2014
- U.S. locations
- 1
- States / cities
- Aurora, Colorado
- Conditions
- COVID-19, Vaccine Refusal
- Interventions
- Text Message, Motivational Interviewing, Electronic Educational Message with Tailored Questions/Prompts
- Behavioral
- Lead sponsor
- University of Oklahoma
- Other
- Eligibility
- 18 Years to 100 Years
- Enrollment
- 312 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2022 – 2023
- U.S. locations
- 1
- States / cities
- Oklahoma City, Oklahoma
- Conditions
- Covid19, Vaccine Refusal, Communication
- Interventions
- YourCoViDVaxFacts
- Behavioral
- Lead sponsor
- Meharry Medical College
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 300 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2021 – 2022
- U.S. locations
- 1
- States / cities
- Nashville, Tennessee
- Conditions
- Influenza, Respiratory Tract Infections
- Interventions
- Text Fixed R/R Messages with Direct Appointment Schedule Link, Text Pre-Appointment Reminder, Portal Pre-Commitment Prompt with Tailored R/R Messages with Direct Appointment Schedule Link, Portal Fixed R/R Messages with Direct Appointment Schedule Link, Portal Pre-Appointment Reminder
- Behavioral
- Lead sponsor
- University of California, Los Angeles
- Other
- Eligibility
- 6 Months and older
- Enrollment
- 262,085 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2022 – 2023
- U.S. locations
- 1
- States / cities
- Los Angeles, California
- Conditions
- Papilloma Viral Infection, Vaccine Hesitancy, Communication
- Interventions
- HPV Message 1, HPV Message 2, HPV Message 3, Control Message, Provider Strong-Recommendation Toolkit
- Behavioral
- Lead sponsor
- Abramson Cancer Center at Penn Medicine
- Other
- Eligibility
- 18 Years to 45 Years
- Enrollment
- 9,002 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2025 – 2027
- U.S. locations
- 1
- States / cities
- Philadelphia, Pennsylvania
- 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
- Conditions
- Vaccination Refusal
- Interventions
- Group intervention
- Behavioral
- Lead sponsor
- MultiCare Health System Research Institute
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 429 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2023 – 2024
- U.S. locations
- 1
- States / cities
- Puyallup, Washington
- Conditions
- Vaccination Hesitancy, Human Papillomavirus Vaccination, Vaccine Refusal
- Interventions
- Argument inoculation messages, Simple forewarning message
- Behavioral
- Lead sponsor
- University of Pennsylvania
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 523 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2023
- U.S. locations
- 1
- States / cities
- Philadelphia, Pennsylvania
- 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
- Conditions
- Influenza, Vaccination, Health Promotion, Health Behavior, Risk Reduction
- Interventions
- Risk Reduction
- Behavioral
- Lead sponsor
- Geisinger Clinic
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 40,671 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2022
- U.S. locations
- 1
- States / cities
- Danville, Pennsylvania
- 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