Clinical Trial

Assessment of Chikungunya Virus Seroprevalence Before VLA1553 Vaccination in the Municipalities Selected for Participation in the VLA1553 Pilot Vaccination Strategy in Brazil

Active, Not Recruiting
View on ClinicalTrials.gov →
Record status
This record was last updated February 11, 2026 (before its estimated July 31, 2026 completion). Its status may not reflect the trial's current state.
Summary
This is a cross-sectional serosurvey using household cluster sampling conducted before the VLA1553 pilot vaccination strategy will be implemented in about 10 municipalities in Brazil.
Protocol Amendment History 2 amendments
This ClinicalTrials.gov record has been amended 2 times since 2025-09-01; most recent amendment 2026-02-09.
Status change: Enrolling by Invitation → Active, Not Recruiting 2026-02-09
Status change: Not Yet Recruiting → Enrolling by Invitation 2025-09-24
Trial Details
NCT Number NCT07163845
Lead Sponsor Valneva Austria GmbH
Collaborators: Butantan Foundation, Coalition for Epidemic Preparedness Innovations
Conditions Chikungunya Virus Infection
Enrollment 5,354 participants
Start Date 2025-09-22
Primary Completion 2026-07-31 (estimated)
Study Completion 2026-12-31 (estimated)
Updated on ClinicalTrials.gov 2026-02-11