# B Cell and Antibody Response to Seasonal Influenza Vaccines in Younger and Older Adults

> **NCT04101838** · PHASE4 · ACTIVE_NOT_RECRUITING · sponsor: **University of Alabama at Birmingham** · enrollment: 50 (estimated)

## Conditions studied

- Influenza

## Interventions

- **DRUG:** Fluzone
- **DRUG:** Flucelvax
- **DRUG:** Fluzone High-Dose
- **DRUG:** Fluad

## Key facts

- **NCT ID:** NCT04101838
- **Lead sponsor:** University of Alabama at Birmingham
- **Sponsor class:** OTHER
- **Phase:** PHASE4
- **Study type:** INTERVENTIONAL
- **Status:** ACTIVE_NOT_RECRUITING
- **Start date:** 2021-04-01
- **Primary completion:** 2026-05-11
- **Final completion:** 2027-05
- **Target enrollment:** 50 (ESTIMATED)
- **Last updated:** 2026-05-14


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04101838

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04101838, "B Cell and Antibody Response to Seasonal Influenza Vaccines in Younger and Older Adults". Retrieved via MORVS 2026-10-14 from https://api.morvs.ai/clinical/NCT04101838. Licensed CC0.

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