- Conditions
- Recurrent Respiratory Papillomatosis, Papillomavirus Infection, Papillomaviridae
- Interventions
- Zopapogene imadenovec (Zopa)
- Drug
- Lead sponsor
- Precigen, Inc
- Industry
- Eligibility
- 18 Years and older
- Enrollment
- 30 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2024 – 2028
- U.S. locations
- 3
- States / cities
- Atlanta, Georgia • Bethesda, Maryland • Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Dec 14, 2025 · Synced May 22, 2026, 4:45 AM EDT