# A Clinical Observational Study of SARS-CoV-2 Specific CD8 T-Cell Responses to COVID-19 Vaccines in Humans

> **NCT04852289** · — · ACTIVE_NOT_RECRUITING · sponsor: **National Institute on Aging (NIA)** · enrollment: 78 (actual)

## Conditions studied

- COVID-19

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT04852289
- **Lead sponsor:** National Institute on Aging (NIA)
- **Sponsor class:** NIH
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** ACTIVE_NOT_RECRUITING
- **Start date:** 2021-04-20
- **Primary completion:** 2026-12-31
- **Final completion:** 2027-06-30
- **Target enrollment:** 78 (ACTUAL)
- **Last updated:** 2025-12-19


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04852289

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04852289, "A Clinical Observational Study of SARS-CoV-2 Specific CD8 T-Cell Responses to COVID-19 Vaccines in Humans". Retrieved via AI Analytics 2026-05-24 from https://api.ai-analytics.org/clinical/NCT04852289. Licensed CC0.

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