# COVID-19 Associated Lymphopenia Pathogenesis Study in Blood

> **NCT04401436** · — · COMPLETED · sponsor: **National Institute of Allergy and Infectious Diseases (NIAID)** · enrollment: 240 (actual)

## Conditions studied

- Coronavirus Disease 2019

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT04401436
- **Lead sponsor:** National Institute of Allergy and Infectious Diseases (NIAID)
- **Sponsor class:** NIH
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** COMPLETED
- **Start date:** 2020-05-22
- **Primary completion:** 2025-02-20
- **Final completion:** 2025-02-24
- **Target enrollment:** 240 (ACTUAL)
- **Last updated:** 2025-10-27


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04401436

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04401436, "COVID-19 Associated Lymphopenia Pathogenesis Study in Blood". Retrieved via AI Analytics 2026-05-26 from https://api.ai-analytics.org/clinical/NCT04401436. Licensed CC0.

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