Antibody Persistence And Long Term Safety Of A Chikungunya Virus Vaccine (VLA1553)
Public ClinicalTrials.gov record NCT04838444. 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
An Open-Label, Single Arm Trial To Evaluate Antibody Persistence And Long Term Safety Of A Live-Attenuated Chikungunya Virus Vaccine (VLA1553) In Adults Aged 18 Years and Above
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
In this open-label Phase 3b, single arm trial, persistence of antibodies and long term safety will be evaluated in up to 375 participants rolled over from trial VLA1553-301 (NCT number: NCT04546724).
Study identification
- NCT ID
- NCT04838444
- Recruitment status
- Active, not recruiting
- Study type
- Interventional
- Phase
- Phase 3
- Enrollment
- 363 participants
Conditions and interventions
Conditions
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
- Apr 2, 2021 (Actual)
- Primary completion
- Mar 3, 2023 (Actual)
- Completion
- May 2031 (Estimated)
- Last update posted
- Jul 9, 2026
2021 – 2031
United States locations
- U.S. sites
- 10
- U.S. states
- 9
- U.S. cities
- 10
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Accelerated Enrollment Solutions (AES) | Phoenix | Arizona | 85020 | — |
| Velocity Clinical Research | Hallandale | Florida | 33090 | — |
| Accelerated Enrollment Solutions (AES) | Chicago | Illinois | 60602 | — |
| Alliance for Multispecialty Research (AMR) | Lexington | Kentucky | 40509 | — |
| Velocity Clinical Research | Grand Island | Nebraska | 68803 | — |
| Velocity Clinical Research | Omaha | Nebraska | 68134 | — |
| Alliance for Multispecialty Research (AMR) | Knoxville | Tennessee | 37920 | — |
| Velocity Clinical Research | Austin | Texas | 78759 | — |
| Velocity Clinical Research | West Jordan | Utah | 84088 | — |
| Allliance for Multispecialty Research (AMR) | Norfolk | Virginia | 23502 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT04838444, 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 Jul 9, 2026 · Synced Oct 19, 2026
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Open the official record
The complete public registry record, listed eligibility criteria, and available contact information for NCT04838444 live on ClinicalTrials.gov.