# An Epidemiological Investigation on Correct Wearing of Mask by Direct Spray Test

> **NCT04497675** · — · COMPLETED · sponsor: **Fuwai Yunnan Cardiovascular Hospital** · enrollment: 6000 (actual)

## Conditions studied

- Respiratory Infectious Diseases

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT04497675
- **Lead sponsor:** Fuwai Yunnan Cardiovascular Hospital
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** COMPLETED
- **Start date:** 2020-06-19
- **Primary completion:** 2020-08-31
- **Final completion:** 2020-08-31
- **Target enrollment:** 6000 (ACTUAL)
- **Last updated:** 2020-10-19


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04497675

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04497675, "An Epidemiological Investigation on Correct Wearing of Mask by Direct Spray Test". Retrieved via AI Analytics 2026-06-03 from https://api.ai-analytics.org/clinical/NCT04497675. Licensed CC0.

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