- 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
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 25–36
of 36
matching trials from the live ClinicalTrials.gov search.
- Conditions
- COVID-19
- Interventions
- mHealth Outreach, Care Coordination
- Other
- Lead sponsor
- University of California, San Diego
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 398 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2024 – 2027
- U.S. locations
- 4
- States / cities
- El Cajon, California • Escondido, California • La Jolla, California + 1 more
- Conditions
- Papillomavirus Vaccines
- Interventions
- Reminder Sent Via Preferred Method of Communication, Reminder Sent Via Mailed Letter
- Behavioral
- Lead sponsor
- Huong Nguyen, PhD
- Other
- Eligibility
- 12 Years to 12 Years
- Enrollment
- 5,451 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2021 – 2026
- U.S. locations
- 1
- States / cities
- Marshfield, Wisconsin
- 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
- Vaccines
- Interventions
- HPV Vaccine Reminder Recall - Autodialer, HPV Vaccine Reminder Recall - Texting
- Behavioral
- Lead sponsor
- University of California, Los Angeles
- Other
- Eligibility
- 11 Years to 14 Years
- Enrollment
- 37,003 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2017 – 2019
- U.S. locations
- 1
- States / cities
- Los Angeles, California
- Conditions
- COVID-19, Vaccine Hesitancy
- Interventions
- Health Communication, Health Communication + Structural
- Behavioral
- Lead sponsor
- Marc Kiviniemi
- Other
- Eligibility
- 18 Years to 99 Years
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2026 – 2027
- U.S. locations
- 1
- States / cities
- Hazard, Kentucky
- 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
- Conditions
- Human Papillomavirus Vaccines
- Interventions
- Tailored messages, Standard messages
- Behavioral
- Lead sponsor
- Rutgers, The State University of New Jersey
- Other
- Eligibility
- 18 Years to 80 Years
- Enrollment
- 70 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2025 – 2026
- U.S. locations
- 1
- States / cities
- New Brunswick, New Jersey
- 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
- 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
- Human Papilloma Virus (HPV)
- Interventions
- Text Message, PostCard, Standard of Care, Motivational Interview
- Behavioral
- Lead sponsor
- University of Florida
- Other
- Eligibility
- 18 Years to 99 Years
- Enrollment
- 325 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2015 – 2016
- U.S. locations
- 1
- States / cities
- Gainesville, Florida
- Conditions
- Influenza, Vaccine Hesitancy
- Interventions
- Text messaging
- Behavioral
- Lead sponsor
- University of Southern California
- Other
- Eligibility
- 6 Months and older
- Enrollment
- 228,831 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2022 – 2023
- U.S. locations
- 1
- States / cities
- Los Angeles, California