# Global Epidemiologic Study of Preexisting Immunity to AAV in Adults With Severe Hemophilia

> **NCT03185897** · — · COMPLETED · sponsor: **Baxalta now part of Shire** · enrollment: 242 (actual)

## Conditions studied

- Hemophilia A
- Hemophilia B

## Interventions

- **OTHER:** Non-treatment, seroprevalence

## Key facts

- **NCT ID:** NCT03185897
- **Lead sponsor:** Baxalta now part of Shire
- **Sponsor class:** INDUSTRY
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** COMPLETED
- **Start date:** 2017-06-14
- **Primary completion:** 2021-03-17
- **Final completion:** 2021-03-17
- **Target enrollment:** 242 (ACTUAL)
- **Last updated:** 2021-10-25


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT03185897

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT03185897, "Global Epidemiologic Study of Preexisting Immunity to AAV in Adults With Severe Hemophilia". Retrieved via AI Analytics 2026-05-30 from https://api.ai-analytics.org/clinical/NCT03185897. Licensed CC0.

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