# Quantification of Exhaled Particles to Identify Airborne Transmission Risks of COVID-19

> **NCT04771585** · NA · COMPLETED · sponsor: **Fraunhofer-Institute of Toxicology and Experimental Medicine** · enrollment: 30 (actual)

## Conditions studied

- Healthy

## Interventions

- **OTHER:** Community Mask
- **OTHER:** Surgical Mask
- **OTHER:** FFP2 respirator
- **OTHER:** FFP3 respirator

## Key facts

- **NCT ID:** NCT04771585
- **Lead sponsor:** Fraunhofer-Institute of Toxicology and Experimental Medicine
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2021-03-29
- **Primary completion:** 2021-08-20
- **Final completion:** 2021-08-20
- **Target enrollment:** 30 (ACTUAL)
- **Last updated:** 2021-08-26


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04771585

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04771585, "Quantification of Exhaled Particles to Identify Airborne Transmission Risks of COVID-19". Retrieved via AI Analytics 2026-05-27 from https://api.ai-analytics.org/clinical/NCT04771585. Licensed CC0.

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