Pediatric Vaccinations

May 12, 2026 updated by: NYU Langone Health
As the Covid-19 pandemic hit New York City in the spring of 2020, many families were home-bound due to the city-wide lockdown. As a result, families in New York City were unable to attend their child's healthcare appointments and many young children did not receive their regularly-scheduled vaccinations. Parts of the city-wide lockdown did eventually lift in the summer of 2020 as positive Covid-19 virus rates declined in NYC. However, regularly scheduled vaccination rates (non-Covid-related) remain low. Yet, it is critical that young children receive their mandatory vaccines in a timely manner to decrease the chance of contracting preventable illnesses. Thus, the investigators seek to increase vaccination rates among children ages 0-2 years in Sunset Park Brooklyn.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Observational

Enrollment (Actual)

1034

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • New York
      • New York, New York, United States, 10016
        • NYU Langone Health

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

1 year to 2 years (Child)

Accepts Healthy Volunteers

No

Sampling Method

Probability Sample

Study Population

Children ages 0-2 years with delayed vaccinations (due for vaccine and due soon) in NYU Brooklyn Family Health Centers network.

Description

Inclusion Criteria:

  • Children ages 0-2 years with delayed vaccinations (due for vaccine and due soon) in NYU Brooklyn Family Health Centers network.

Exclusion Criteria:

  • Children above the age of 2 who do not attend NYU Brooklyn Family Health Centers network

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Text message 1
Text messaging frame = safety and cleanness of clinic site. Text parents of children 0-2 years old who are due and due soon for a vaccine across the entire NYU-Brooklyn Family Health Center network.
Behavioral: Text messaging
Text parents of children (age 0-2yrs) who are due and due soon for a vaccine across the entire NYU-Brooklyn FHC network to increase vaccination rates.
Text message 2
Text messaging frame = importance of vaccines. Text parents of children 0-2 years old who are due and due soon for a vaccine across the entire NYU-Brooklyn Family Health Center network.
Behavioral: Text messaging
Text parents of children (age 0-2yrs) who are due and due soon for a vaccine across the entire NYU-Brooklyn FHC network to increase vaccination rates.
No text message
No text sent.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Change in pediatric vaccination rate among children ages 0-2 years (proportion of vaccines due per person)
Time Frame: Baseline - 1 year
Baseline - 1 year

Secondary Outcome Measures

Outcome Measure
Time Frame
Number of scheduled appointments
Time Frame: 1 year
1 year

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

NYU Langone Health

Investigators

  • Principal Investigator: Holly Krelle, NYU Langone Health

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

February 9, 2021

Primary Completion (Actual)

December 21, 2023

Study Completion (Actual)

January 2, 2024

Study Registration Dates

First Submitted

March 5, 2021

First Submitted That Met QC Criteria

June 22, 2021

First Posted (Actual)

June 23, 2021

Study Record Updates

Last Update Posted (Actual)

May 14, 2026

Last Update Submitted That Met QC Criteria

May 12, 2026

Last Verified

May 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • QI- Pediatric Vaccinations

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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