- Conditions
- Participants With or Without Stable Co-morbidities Associated With Progression to Severe COVID-19 at Different Stages of the Protocol
- Interventions
- Ad26.COV2.S, Placebo
- Biological · Other
- Lead sponsor
- Janssen Vaccines & Prevention B.V.
- Industry
- Eligibility
- 18 Years and older
- Enrollment
- 44,325 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2020 – 2023
- U.S. locations
- 117
- States / cities
- Birmingham, Alabama • Huntsville, Alabama • Glendale, Arizona + 77 more
Source: ClinicalTrials.gov public record
Updated Feb 3, 2025 · Synced May 21, 2026, 10:10 PM EDT