# Long-term Observation of Hemagglutinin and Neuraminidase Inhibition Antibody Titers After Influenza Challenge

> **NCT02511002** · — · ENROLLING_BY_INVITATION · sponsor: **National Institute of Allergy and Infectious Diseases (NIAID)** · enrollment: 200 (estimated)

## Conditions studied

- Post Influenza

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT02511002
- **Lead sponsor:** National Institute of Allergy and Infectious Diseases (NIAID)
- **Sponsor class:** NIH
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** ENROLLING_BY_INVITATION
- **Start date:** 2015-07-17
- **Primary completion:** 2027-05-12
- **Final completion:** 2027-05-12
- **Target enrollment:** 200 (ESTIMATED)
- **Last updated:** 2026-04-08


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT02511002

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT02511002, "Long-term Observation of Hemagglutinin and Neuraminidase Inhibition Antibody Titers After Influenza Challenge". Retrieved via AI Analytics 2026-05-26 from https://api.ai-analytics.org/clinical/NCT02511002. Licensed CC0.

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