# COVID-19 Symptom Tracker

> **NCT04331509** · — · ACTIVE_NOT_RECRUITING · sponsor: **King's College London** · enrollment: 10000000 (estimated)

## Conditions studied

- COVID-19

## Interventions

- **OTHER:** No Intervention

## Key facts

- **NCT ID:** NCT04331509
- **Lead sponsor:** King's College London
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** ACTIVE_NOT_RECRUITING
- **Start date:** 2020-03-23
- **Primary completion:** 2026-03-23
- **Final completion:** 2026-03-23
- **Target enrollment:** 10000000 (ESTIMATED)
- **Last updated:** 2025-03-13

## Collaborators

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## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04331509

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04331509, "COVID-19 Symptom Tracker". Retrieved via AI Analytics 2026-06-25 from https://api.ai-analytics.org/clinical/NCT04331509. Licensed CC0.

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*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*