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Showing 25–41 of 17 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Immunization Rates Clear all
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 11, 2026, 4:09 AM EDT
Not listed Phase 4 Interventional Accepts healthy volunteers

Effect of Influenza Vaccination on Donor Egg Recipient Outcomes

NCT02946177
View directory record Official record
Conditions
Infertility, Recurrent Miscarriage
Interventions
Influenza Vaccine, Sterile Saline
Biological · Other
Lead sponsor
Center for Human Reproduction
Other
Eligibility
21 Years to 45 Years · Female only
Enrollment
126 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2021
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 17, 2020 · Synced Jun 11, 2026, 4:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Improving Influenza Vaccination Rates Among Health Care Professionals

NCT00404664
View directory record Official record
Conditions
Influenza
Interventions
influenza vaccine, reminders letters, raffle prize
Behavioral
Lead sponsor
The Cleveland Clinic
Other
Eligibility
Not listed
Enrollment
800 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2005
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Nov 28, 2006 · Synced Jun 11, 2026, 4:09 AM EDT
Completed Not applicable Interventional Results available

Virtual Immersive Communication Training on Recommending Immunizations

NCT04368455
View directory record Official record
Conditions
Human Papilloma Virus
Interventions
Virtual Immersive Communication Training on Recommending Immunizations (VICTORI), HPV Same Way Same Day App
Behavioral
Lead sponsor
Brittany Rosen
Other
Eligibility
18 Years and older
Enrollment
161 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 11, 2023 · Synced Jun 11, 2026, 4:09 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 Jun 11, 2026, 4:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Pharmacist Impact on Pneumococcal Polysaccharide Vaccination Rates in Patients With Diabetes in a Supermarket Pharmacy Chain

NCT03851978
View directory record Official record
Conditions
Pneumococcal Pneumonia
Interventions
Pharmacist Vaccine Education
Behavioral
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
19 Years to 64 Years
Enrollment
431 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
4
States / cities
Midlothian, Virginia • Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Mar 14, 2019 · Synced Jun 11, 2026, 4:09 AM 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 11, 2026, 4:09 AM EDT
Not listed Phase 4 Interventional Accepts healthy volunteers

Effect of Influenza Vaccination on IVF Outcomes - IVF

NCT02947217
View directory record Official record
Conditions
Infertility
Interventions
Influenza Vaccine, Sterile Saline
Biological · Other
Lead sponsor
Center for Human Reproduction
Other
Eligibility
21 Years to 38 Years · Female only
Enrollment
238 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2024
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 9, 2022 · Synced Jun 11, 2026, 4:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Promoting Altruism to Enhance Vaccine Acceptance

NCT04568590
View directory record Official record
Conditions
Vaccine Refusal
Interventions
educational intervention
Behavioral
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
Not listed
Enrollment
510 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 11, 2024 · Synced Jun 11, 2026, 4:09 AM 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 11, 2026, 4:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Testing Multiple Behavioral Science Strategies to Increase Flu-Shot Rates

NCT04565353
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Jan 31, 2022 · Synced Jun 11, 2026, 4:09 AM EDT
Completed Not applicable Interventional

Improving Childhood Immunization

NCT01794286
View directory record Official record
Conditions
Improve Childhood Immunization Rates
Interventions
Provider bulletins, Trigger alerts
Other
Lead sponsor
Johns Hopkins University
Other
Eligibility
28 Years to 40 Years
Enrollment
107 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 17, 2013 · Synced Jun 11, 2026, 4:09 AM EDT
Completed Not applicable Interventional

Centralized Reminder Recall - Flu RCT2

NCT03294473
View directory record Official record
Conditions
Influenza, Human, Orthomyxoviridae Infections, RNA Virus Infections, Virus Disease, Respiratory Tract Infections, Respiratory Tract Disease, Vaccines, Physiological Effects of Drugs
Interventions
R/R - Autodialers, R/R - Texting, R/R - mailed postcard
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
6 Months to 17 Years
Enrollment
70,190 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jun 4, 2019 · Synced Jun 11, 2026, 4:09 AM EDT
Not listed Not applicable Interventional

Improving Immunization Rates in Transplant Candidates Through the Use of a Health Information Technology Tool

NCT04336735
View directory record Official record
Conditions
Transplantation Infection, Vaccination
Interventions
immunization app
Other
Lead sponsor
University of Colorado, Denver
Other
Eligibility
17 Years and older
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Jan 11, 2022 · Synced Jun 11, 2026, 4:09 AM EDT
Completed Not applicable Interventional

The Effect of a Planning Prompt on Seasonal Influenza Vaccination Rates

NCT01207232
View directory record Official record
Conditions
Seasonal Influenza
Interventions
Planning Prompt, Control Condition
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
3,272 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 21, 2010 · Synced Jun 11, 2026, 4:09 AM EDT
Completed Not applicable Interventional

Opting In vs Opting Out

NCT01233804
View directory record Official record
Conditions
Influenza Vaccination
Interventions
Opting Out
Other
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
18 Years and older · Female only
Enrollment
280 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
2
States / cities
Galveston, Texas • Houston, Texas
Source: ClinicalTrials.gov public record
Updated May 30, 2018 · Synced Jun 11, 2026, 4:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Testing Multiple Behavioral Science Strategies to Increase Flu-Shot Rates at a Large Retail Pharmacy

NCT04590066
View directory record Official record
Conditions
Influenza, Human
Interventions
Flu shot text messages
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
734,383 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 31, 2021 · Synced Jun 11, 2026, 4:09 AM EDT