A Study of Ad26.COV2.S in Adults (COVID-19)
Public ClinicalTrials.gov record NCT04436276. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
A Randomized, Double-blind, Placebo-controlled Phase 1/2a Study to Evaluate the Safety, Reactogenicity, and Immunogenicity of Ad26COVS1 in Adults Aged 18 to 55 Years Inclusive and Adults Aged 65 Years and Older
Study identification
- NCT ID
- NCT04436276
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Phase 1, Phase 2
- Lead sponsor
- Janssen Vaccines & Prevention B.V.
- Industry
- Enrollment
- 1,085 participants
Conditions and interventions
Conditions
Interventions
- Ad26.COV2.S Biological
- Placebo Biological
Biological
Eligibility (public fields only)
- Age range
- 18 Years and older
- Sex
- All
- Healthy volunteers
- Accepts healthy volunteers
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Jul 14, 2020
- Primary completion
- Feb 20, 2023
- Completion
- Feb 20, 2023
- Last update posted
- Feb 3, 2025
2020 – 2023
United States locations
- U.S. sites
- 7
- U.S. states
- 7
- U.S. cities
- 7
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Optimal Research | San Diego | California | 92108 | — |
| Optimal Research | Melbourne | Florida | 32934 | — |
| Optimal Research | Peoria | Illinois | 61614 | — |
| Optimal Research | Rockville | Maryland | 20850 | — |
| Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center | Boston | Massachusetts | 02215 | — |
| AMR New Orleans, Formerly New Orleans Center for Clinical Research - New Orleans, an AMR company | Knoxville | Tennessee | 37923 | — |
| Optimal Research | Austin | Texas | 78744 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
Non-U.S. locations
This page focuses on the U.S. directory. The official record also lists 5 non-U.S. sites.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT04436276, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Feb 3, 2025 · Synced Jul 22, 2026
Related: full search, browse by condition, browse by drug or therapy, browse by sponsor, browse by U.S. city.
Open the official record
The complete protocol, eligibility criteria, and contact information for NCT04436276 live on ClinicalTrials.gov.