# Workforce Serosurveillance to Track Long-term Modifications to COVID-19 Exposure Due to Factors in the Built Environment

> **NCT04542200** · — · COMPLETED · sponsor: **Northwell Health** · enrollment: 40132 (actual)

## Conditions studied

- Covid19

## Interventions

- **BIOLOGICAL:** Antibody testing

## Key facts

- **NCT ID:** NCT04542200
- **Lead sponsor:** Northwell Health
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** COMPLETED
- **Start date:** 2021-01-01
- **Primary completion:** 2022-07-31
- **Final completion:** 2022-12-31
- **Target enrollment:** 40132 (ACTUAL)
- **Last updated:** 2023-02-06


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04542200

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04542200, "Workforce Serosurveillance to Track Long-term Modifications to COVID-19 Exposure Due to Factors in the Built Environment". Retrieved via AI Analytics 2026-06-04 from https://api.ai-analytics.org/clinical/NCT04542200. Licensed CC0.

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