# HEalth Care Worker pROphylaxis Against COVID-19: The HERO Trial

> **NCT04352946** · PHASE3 · UNKNOWN · sponsor: **GeoSentinel Foundation** · enrollment: 374 (estimated)

## Conditions studied

- Prophylaxis
- COVID-19
- Health Care Worker
- Hydroxychloroquine

## Interventions

- **DRUG:** Hydroxychloroquine Pre-Exposure Prophylaxis
- **DRUG:** Placebo oral tablet

## Key facts

- **NCT ID:** NCT04352946
- **Lead sponsor:** GeoSentinel Foundation
- **Sponsor class:** OTHER
- **Phase:** PHASE3
- **Study type:** INTERVENTIONAL
- **Status:** UNKNOWN
- **Start date:** 2020-04-24
- **Primary completion:** 2020-06-24
- **Final completion:** 2020-08-24
- **Target enrollment:** 374 (ESTIMATED)
- **Last updated:** 2020-04-22


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04352946

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04352946, "HEalth Care Worker pROphylaxis Against COVID-19: The HERO Trial". Retrieved via AI Analytics 2026-06-08 from https://api.ai-analytics.org/clinical/NCT04352946. Licensed CC0.

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