Independent directory Public ClinicalTrials.gov records United States
Clinical Trials Finder
Objective public record navigation
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 are retrieved from ClinicalTrials.gov and synchronized into the directory. Search pages remain noindex by default.

Clear filters
ClinicalTrials.gov public records Last synced Jun 10, 2026, 11:31 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 1–24 of 27 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Filters: Condition: Immunization Reminder System Clear all
Completed Not applicable Interventional

Effectiveness of Influenza Vaccine Reminder Systems

NCT01852656
View directory record Official record
Conditions
Asthma, Chronic Obstructive Pulmonary Disease
Interventions
Postcard and IVR Reminder Group, Postcard Only Reminder Group, IVR Only Reminder Group
Behavioral
Lead sponsor
Kaiser Permanente
Other
Eligibility
19 Years to 64 Years
Enrollment
12,255 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated May 13, 2013 · Synced Jun 10, 2026, 11:31 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Flu Shot Pre-visit Questionnaire

NCT05508698
View directory record Official record
Conditions
Influenza
Interventions
Precommitment Nudge, Salience
Behavioral
Lead sponsor
Geisinger Clinic
Other
Eligibility
18 Years and older
Enrollment
230,962 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Danville, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 24, 2023 · Synced Jun 10, 2026, 11:31 PM 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 Jun 10, 2026, 11:31 PM EDT
Completed Not applicable Interventional

Accountable Care Organizations/ Public Health Collaborative

NCT02133391
View directory record Official record
Conditions
Immunization Reminder System
Interventions
Centralized Reminder/Recall (R/R), Practice-based Reminder/Recall
Other
Lead sponsor
University of Colorado, Denver
Other
Eligibility
19 Months and older
Enrollment
78,354 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Sep 28, 2017 · Synced Jun 10, 2026, 11:31 PM EDT
Completed Not applicable Interventional

Pediatric Second Influenza Dose Portal Reminder Recall

NCT04668417
View directory record Official record
Conditions
Influenza, Respiratory Tract Infections
Interventions
Portal Reminders for Second Dose of Influenza Vaccine with Direct Scheduling Link, Portal Reminders for Second Dose of Influenza Vaccine without Direct Scheduling Link
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
6 Months to 36 Months
Enrollment
698 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 27, 2021 · Synced Jun 10, 2026, 11:31 PM EDT
Completed Not applicable Interventional Results available

Patient Portal Flu Vaccine Reminders_RCT 5 (LADHS)

NCT05535777
View directory record Official record
Conditions
Influenza, Respiratory Tract Infections
Interventions
Enhanced texts with Callback by a Person, Enhanced Bidirectional Texts
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
6 Months and older
Enrollment
246,295 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
2
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 10, 2025 · Synced Jun 10, 2026, 11:31 PM EDT
Terminated Not applicable Interventional Results available

Patient Portal Flu Vaccine Reminders_RCT 4

NCT05052190
View directory record Official record
Conditions
Influenza, Respiratory Tract Infections
Interventions
Text Message R/R with Direct Appointment Schedule Link, Text Message R/R without Direct Appointment Schedule Link, Text Pre-Appointment Reminder, Portal Message R/R with Direct Appointment Schedule Link, Portal Message R/R without Direct Appointment Schedule Link, Portal Pre-Appointment Reminder
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
6 Months and older
Enrollment
239,567 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 10, 2025 · Synced Jun 10, 2026, 11:31 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Email-based Reminders Promoting Recommended Pediatric Preventative Visits

NCT05317884
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Nov 22, 2022 · Synced Jun 10, 2026, 11:31 PM EDT
Completed Not applicable Interventional Results available

Patient Portal Reminder/Recall for Influenza Vaccination in a Health System- RCT 2

NCT04110314
View directory record Official record
Conditions
Influenza, Respiratory Tract Infections
Interventions
Portal Reminders for Influenza Vaccination: Gain-framed, Portal Reminders for Influenza Vaccination: Loss-framed, Pre-commitment prompt
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
4 Months and older
Enrollment
430,636 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 4, 2022 · Synced Jun 10, 2026, 11:31 PM EDT
Completed Not applicable Interventional

Personalized Nudging to Increase Influenza Vaccinations

NCT06566534
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Jan 15, 2025 · Synced Jun 10, 2026, 11:31 PM EDT
Completed Not applicable Interventional Results available

Patient Portal - Flu Reminder Recall

NCT03666026
View directory record Official record
Conditions
Influenza, Respiratory Tract Infections, Vaccines
Interventions
1 MyChart R/R, 2 MyChart R/R, 3 MyChart R/R
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
4 Months and older
Enrollment
164,205 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Nov 16, 2021 · Synced Jun 10, 2026, 11:31 PM EDT
Completed Not applicable Interventional Results available

Patient Portal Flu Vaccine Reminders (5)

NCT05525494
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Aug 6, 2024 · Synced Jun 10, 2026, 11:31 PM EDT
Completed Not applicable Interventional

HPV IIS Reminder/Recall- New York State

NCT03057379
View directory record Official record
Conditions
Reminder Systems
Interventions
Vaccine Reminder Recall
Other
Lead sponsor
University of California, Los Angeles
Other
Eligibility
11 Years to 17 Years
Enrollment
30,616 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 27, 2020 · Synced Jun 10, 2026, 11:31 PM EDT
Completed Not applicable Interventional

Study of Adolescent Immunization Recall Systems

NCT01390363
View directory record Official record
Conditions
Immunization, Reminder Systems
Interventions
Parent Only Phone Call, Parent and Adolescent Phone Call
Other
Lead sponsor
Boston Children's Hospital
Other
Eligibility
13 Years to 17 Years · Female only
Enrollment
420 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 12, 2017 · Synced Jun 10, 2026, 11:31 PM EDT
Completed Not applicable Interventional

Seasonal Influenza Vaccination Reminders for Children With High-risk Conditions

NCT01431183
View directory record Official record
Conditions
Seasonal Influenza Vaccination
Interventions
Mailed influenza vaccination reminder notice
Behavioral
Lead sponsor
University of Michigan
Other
Eligibility
24 Months to 60 Months
Enrollment
3,618 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Sep 8, 2011 · Synced Jun 10, 2026, 11:31 PM EDT
Completed Not applicable Interventional

Centralized IIS-based Reminder/Recall to Increase Childhood Influenza Vaccination Rates_2nd Trial in Colorado

NCT03246100
View directory record Official record
Conditions
Reminder Systems, Influenza Vaccines
Interventions
Reminders
Behavioral
Lead sponsor
University of Colorado, Denver
Other
Eligibility
6 Months to 17 Years
Enrollment
25,531 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Jun 23, 2019 · Synced Jun 10, 2026, 11:31 PM EDT
Completed Not applicable Interventional Results available

Patient Portal Reminder/Recall for Influenza Vaccination in a Health System- UCLA Portal R/R Influenza RCT 3

NCT04533685
View directory record Official record
Conditions
Influenza, Respiratory Tract Infections
Interventions
Portal Reminders for Influenza Vaccination: Direct scheduling link, Portal Reminders for Influenza Vaccination: No direct scheduling link, Pre-Commitment Prompt, Pre-Appointment flu vaccine reminders
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
4 Months and older
Enrollment
213,773 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Oct 24, 2022 · Synced Jun 10, 2026, 11:31 PM EDT
Completed Not applicable Interventional Results available

Patient Portal Flu Vaccine Reminders (RCT 6)

NCT06062264
View directory record Official record
Conditions
Influenza, Respiratory Tract Infections
Interventions
Portal-based Video Message, Portal-based Infographic Message
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
6 Months and older
Enrollment
22,233 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 19, 2025 · Synced Jun 10, 2026, 11:31 PM EDT
Completed Not applicable Interventional

Population Versus Practice-based Interventions to Increase Immunizations

NCT01296906
View directory record Official record
Conditions
Health Services Research, Comparative Effectiveness, Immunization
Interventions
Recall conducted by private practices, Recall conducted centrally by local health department
Behavioral
Lead sponsor
University of Colorado, Denver
Other
Eligibility
19 Months and older
Enrollment
31,567 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Jun 20, 2013 · Synced Jun 10, 2026, 11:31 PM EDT
Completed Not applicable Interventional

Comparative Effectiveness Trial of Two Reminder/Recall Methods to Increase Immunization Rates in Young Children

NCT01557621
View directory record Official record
Conditions
Immunization Rates
Interventions
Collaborative Pop-Based R/R: Phone/Mail Group, Collaborative Pop-Based R/R: Mail-Only Group, Practice-based Recall
Behavioral
Lead sponsor
University of Colorado, Denver
Other
Eligibility
19 Months to 5 Years
Enrollment
68,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
2
States / cities
Aurora, Colorado • Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Dec 15, 2015 · Synced Jun 10, 2026, 11:31 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Evaluation of a Multilevel Intervention on Adult COVID-19 and Influenza Vaccination Rate

NCT06646406
View directory record Official record
Conditions
COVID-19 Immunisation, Influenza Vaccine
Interventions
Patient letter and clinician communication
Behavioral
Lead sponsor
Mayo Clinic
Other
Eligibility
19 Years and older
Enrollment
114,165 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
2
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Aug 4, 2025 · Synced Jun 10, 2026, 11:31 PM EDT
Completed Not applicable Interventional

HPV Centralized R/R RCT #2 - New York State

NCT03294551
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated May 26, 2021 · Synced Jun 10, 2026, 11:31 PM EDT
Completed Not applicable Interventional Results available

High-risk Influenza Vaccine Alert

NCT05492786
View directory record Official record
Conditions
Influenza
Interventions
Alert, Salient alert features, High-risk Text, Risk factors
Behavioral
Lead sponsor
Geisinger Clinic
Other
Eligibility
18 Years and older
Enrollment
80,452 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Danville, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 29, 2024 · Synced Jun 10, 2026, 11:31 PM EDT
Completed Not applicable Interventional

Evaluation of the School Kids Influenza Prevention Project

NCT03307642
View directory record Official record
Conditions
Childhood Influenza Vaccination, School-located Influenza Vaccination
Interventions
Text message notification
Other
Lead sponsor
University of Rochester
Other
Eligibility
4 Years to 19 Years
Enrollment
18,540 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Mar 11, 2018 · Synced Jun 10, 2026, 11:31 PM EDT