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

StatusActive, Not Recruiting
PhaseNot specified
Started
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.

Record History

  1. Primary completion date: Dec 15, 2025 to Jul 31, 2026
    • Trial status: Enrolling by Invitation to Active, Not Recruiting
    • Enrollment target: estimated 4988 to confirmed 5354
    v3
  2. Trial status: Not Yet Recruiting to Enrolling by Invitation
    • Study sites: 0 to 4
    • Start date changed from estimate of Sep 8, 2025 to Sep 22, 2025
    v2
  3. Study First Submitted
  • Stopped: an ongoing trial was terminated, suspended or withdrawn.
  • Notable: the trial’s plan changed such as a big move in its timeline or size, a new primary endpoint, sponsor or phase, or recruiting opened or resumed.
  • Minor: routine progress and housekeeping, such as sites added or enrollment closed.
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.
Trial Details
NCT Number NCT07163845
Lead Sponsor Valneva Austria GmbH
Collaborators: Butantan Foundation, Coalition for Epidemic Preparedness Innovations
Conditions
(from sponsor)		 Chikungunya Virus Infection
Related terms Chikungunya Fever
Enrollment 5,354 participants
Start Date
Primary Completion (estimated)
Study Completion (estimated)
Updated on ClinicalTrials.gov