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Your voice may hold clues to long COVID – researchers launch app study

NCT ID NCT07156994

Knowledge-focused Sponsor: Luxembourg Institute of Health Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 24, 2026 · Last updated Sep 16, 2026 · Updated 3 times

Summary

This study will use the Long COVID Companion app to collect voice recordings and health questionnaires from 300 adults with ongoing COVID-19 symptoms. Researchers hope to identify vocal biomarkers for common issues like fatigue, brain fog, and breathing problems. The goal is to enable remote monitoring of Long COVID through voice analysis alone.

What this could mean

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

What this could lead to
If successful, this could lead to a simple voice-based tool to remotely monitor Long COVID symptoms.
What could go wrong
This is an early observational study, not a treatment trial. It may not find reliable voice patterns, and results may not apply to all patients.

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.

Participants

About 300 people

The number the study aims to enrol. It can still change while the study runs.

Started

Dec 2025

Expected to finish

Sep 2028

An estimate. End dates often move.

Lead sponsor

A government agency

The lead sponsor is a government body.

Who can take part

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

Who is studied

All adult people with suspected Long COVID can participate in this study. As the study is completely digital, there are no restriction in terms of living country. All the users of the Long COVID Companion app will be invited to participate in the study (by email or directly in the app). Recruitment will also be done by communications on social media, and by distributing study flyers in the waiting rooms of Long COVID consultations network. Participants to the PrediCOVID study who accepted to be recontacted will also be invited. Information regarding the study will also be disseminated to all people with Long COVID in the database of the Long COVID consultation network in Luxembourg.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

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: * Adult (≥18 years old) * Male or female * People with persisting symptoms related to COVID-19 (With Long COVID diagnosis or not) * Adequate understanding of one of the study languages (English, French, German) * Electronically signed informed consent form Exclusion Criteria: ● No specific exclusion criteria

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Conditions

The condition(s) this trial relates to.

long COVID-19

As listed by the trial registrant

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

Long COVID

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • LIH

    RECRUITING

    Strassen, L-1445, Luxembourg

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