Chatbot nudges parents toward flu shots for preschoolers

NCT ID NCT07687719

Not yet recruiting Prevention Sponsor: Chinese University of Hong Kong Source: ClinicalTrials.gov ↗

First seen Jul 07, 2026 · Last updated Jul 08, 2026 · Updated 1 time

Summary

This study tests whether a chatbot delivered through WhatsApp can help mothers decide to get their children aged 3-6 vaccinated against seasonal flu. Mothers are randomly assigned to receive either a chatbot that tailors its messages to their readiness to vaccinate or a standard chatbot. The goal is to see if the personalized approach increases vaccination rates more than the standard one.

What this could mean

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

Active substance: Chatbot-delivered stage-of-change-tailored online intervention
What this could lead to: If it works, this could provide a scalable, low-cost way to increase childhood flu vaccination rates using widely available messaging apps.
What could go wrong: The trial is relatively small (426 participants) and focuses on mothers in Hong Kong, so results may not apply to other populations or settings. The intervention's effect may be modest or short-lived.

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

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Conditions

The condition(s) this trial relates to.

influenza prevention target

As listed by the trial registrant

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

BEHAVIOR CHANGE

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Study contacts

Contact

Phone: •••-•••-•••• Email: •••••@•••••

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