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Can WhatsApp messages stop dengue? new study tests digital health in colombia

NCT ID NCT07517731

Prevention Sponsor: University of Freiburg 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study tested whether sending health tips via WhatsApp could help families in Colombia prevent dengue, Zika, and chikungunya. About 900 households were split into three groups: one got WhatsApp messages plus community support, one got community support only, and one got routine care. Researchers checked if households cleaned water containers more often and if mosquito breeding decreased. The goal was to see if a simple phone-based strategy could make a real difference in disease prevention.

What this could mean

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

Active substance
WhatsApp-based health messages and protective coating for laundry tanks
What this could lead to
If successful, this approach could offer a low-cost, scalable way to reduce mosquito-borne diseases in at-risk communities.
What could go wrong
This is a completed implementation study, not a drug trial. Results may not apply to other regions or populations, and behavior change can be hard to sustain long-term.

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

900 people

The number who actually took part.

Started

Mar 2026

Finished

Mar 2026

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

18 years and older

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: * Households/participants resided within one of the study clusters. * The household had a laundry tank. * One adult household member (household head or another adult resident) was available to participate and provide informed consent. * For participation in the WhatsApp component, the participant owned a smartphone with WhatsApp installed and was able to read and respond to simple WhatsApp messages. Exclusion Criteria: * Uninhabited households. * Households without a laundry tank. * Households already using biological vector control methods in the laundry tank, particularly larvivorous fish. * For the WhatsApp component, households or users without access to a smartphone or without WhatsApp installed.

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Conditions

The condition(s) this trial relates to.

Mosquito-Borne Diseases vector-borne disease chikungunya prevention target dengue disease prevention target Zika virus infectious disease prevention target

As listed by the trial registrant

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

Aedes-borne diseases Chikungunya Dengue Zika

Contacts and locations

Locations

  • Centre for Medicine and Society

    Freiburg im Breisgau, Baden-Wurttemberg, 79098, Germany

  • Instituto Departamental de Salud de Norte de Santander

    Cúcuta, Norte de Satander, 540001, Colombia

More trials for these conditions

Other studies related to the condition(s) this trial covers.