# A Longitudinal Study of COVID-19 Sequelae and Immunity

> **NCT04411147** · — · ACTIVE_NOT_RECRUITING · sponsor: **National Institute of Allergy and Infectious Diseases (NIAID)** · enrollment: 583 (actual)

## Conditions studied

- COVID-19

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT04411147
- **Lead sponsor:** National Institute of Allergy and Infectious Diseases (NIAID)
- **Sponsor class:** NIH
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** ACTIVE_NOT_RECRUITING
- **Start date:** 2020-06-17
- **Primary completion:** 2027-12-31
- **Final completion:** 2027-12-31
- **Target enrollment:** 583 (ACTUAL)
- **Last updated:** 2026-05-07


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04411147

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04411147, "A Longitudinal Study of COVID-19 Sequelae and Immunity". Retrieved via AI Analytics 2026-05-20 from https://api.ai-analytics.org/clinical/NCT04411147. Licensed CC0.

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