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Text or call? study tests best way to boost COVID shots in schools

NCT ID NCT05419232

Prevention Sponsor: Washington University School of Medicine Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jul 21, 2026 · Last updated Jul 22, 2026 · Updated 1 time

Summary

This study compares two strategies to increase COVID-19 vaccination among unvaccinated students, school staff, and their household members. One group receives a text message with a website link about vaccination, while the other group gets a phone call from a peer. The goal is to see which approach leads to more people getting vaccinated within two weeks.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Short Message Service (SMS) + Website Link Strategy or Phone Call with Peer Strategy
What this could lead to
If successful, this could identify the most effective way to encourage COVID-19 vaccination in school communities, helping public health efforts.
What could go wrong
The study is relatively small (262 participants) and relies on self-reported vaccination, which may not be fully accurate. Results may not apply to other regions or populations.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

262 people

The number who actually took part.

Started

Jul 2022

Finished

May 2024

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

Children (under 18), adults (18 to 64) and older adults (65 and over)

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Is not up to date with their COVID-19 vaccinations per CDC guidelines 2. is considered eligible by the CDC at the time of enrollment to receive a COVID-19 vaccine 3. is a staff, student, or household member of staff or student of one of the participating school districts OR a resident of St. Louis City or St. Louis County Exclusion Criteria: 1. Is currently up to date with their COVID-19 vaccinations per CDC guidelines 2. ineligible to receive any COVID-19 vaccine due to medical history or age 3. is not a staff or student, or household member of staff or student of one of the participating school districts AND is not a resident of St. Louis City or St. Louis County 4. participant (or their parents/LAR) do not provide consent.

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Conditions

The condition(s) this trial relates to.

Vaccination Refusal COVID-19 prevention target

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

COVID-19 Vaccination refusal

Contacts and locations

Locations

  • Ferguson-Florissant School District

    Hazelwood, Missouri, 63042, United States

  • Jennings School District

    Jennings, Missouri, 63136, United States

  • Maplewood Richmond Heights School District

    St Louis, Missouri, 63144, United States

  • Normandy Schools Collaborative

    St Louis, Missouri, 63121, United States

  • Pattonville School District

    Saint Ann, Missouri, 63074, United States

  • Ritenour School District

    St Louis, Missouri, 63114, United States

  • St. Louis Language Immersion School

    St Louis, Missouri, 63103, United States

  • University City School District

    University City, Missouri, 63130, United States

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