# Natural History of Systemic and Nasal Mucosal Immunity to Influenza and SARS-CoV-2 in Adults After Vaccination

> **NCT04794829** · — · RECRUITING · sponsor: **National Institute of Allergy and Infectious Diseases (NIAID)** · enrollment: 150 (estimated)

## Conditions studied

- Influenza
- COVID-19

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT04794829
- **Lead sponsor:** National Institute of Allergy and Infectious Diseases (NIAID)
- **Sponsor class:** NIH
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** RECRUITING
- **Start date:** 2021-08-19
- **Primary completion:** 2026-12-31
- **Final completion:** 2026-12-31
- **Target enrollment:** 150 (ESTIMATED)
- **Last updated:** 2026-04-08


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04794829

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04794829, "Natural History of Systemic and Nasal Mucosal Immunity to Influenza and SARS-CoV-2 in Adults After Vaccination". Retrieved via AI Analytics 2026-07-06 from https://api.ai-analytics.org/clinical/NCT04794829. Licensed CC0.

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