Brazilian pilot program tests chikungunya Vaccine's Real-World power

NCT ID NCT07347002

ENROLLING_BY_INVITATION ⭐️ VACCINE ⭐️ Sponsor: Valneva Austria GmbH Source: ClinicalTrials.gov ↗

First seen Jun 27, 2026 · Last updated Jul 17, 2026 · Updated 1 time

Summary

This study will track 1200 people in Brazil who received the VLA1553 chikungunya vaccine as part of a pilot program. Researchers will compare how many vaccinated and unvaccinated people get chikungunya to see if the vaccine works in everyday life. The goal is to understand the vaccine's real-world effectiveness.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance: VLA1553 live-attenuated chikungunya vaccine
What this could lead to: If successful, this could confirm that the VLA1553 vaccine effectively prevents chikungunya in real-world conditions, supporting broader use.
What could go wrong: This is an observational study, not a controlled trial, so results may be influenced by other factors. The vaccine's effectiveness may vary by age or region.

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Conditions

The condition(s) this trial relates to.

chikungunya prevention target

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

CHIKUNGUNYA VIRUS INFECTION

Contacts and locations

Locations

Centro de Pesquisas Clínicas Universidade Federal Sergipe, Hospital e Maternidade São João de Deus

Laranjeiras, Sergipe, 49060-025, Brazil
Fundação Faculdade Regional De Medicina De São José Do Rio Preto

São Pedro, São Paulo, 15090-000, Brazil
Universidade Federal de Minas Gerais, CT Terapias Avançadas e Inovadoras

Belo Horizonte, Minas Gerais, 31270-901, Brazil

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