First children vaccinated in clinical study seeking to expand the target population for the chikungunya vaccine. COPENHAGEN, Denmark, June 12, 2025 – Bavarian Nordic A/S (OMX: BAVA) announced today the initiation of a Phase 3 clinical study of its single-dose, virus-like particle (VLP) chikungunya vaccine, CHIKV VLP in children 2 to 11 years of age. This first trial of CHIKV VLP in a pediatric population aims to expand the target population for the vaccine, currently approved for persons 12 years of age and ...

IXCHIQ® was well tolerated by children aged one to eleven years regardless of the dose or previous chikungunya infection (CHIKV)Antibody levels remained high after six months in both dose groups, although more robust with the full doseSix-month data confirm full dose selection for pivotal Phase 3 trial Saint-Herblain (France), June 5, 2025 – Valneva SE (Nasdaq: VALN; Euronext Paris: VLA), a specialty vaccine company, today announced positive six-month antibody persistence and safety data for its Phase 2 cli ...

Core Insights - Valneva SE has received marketing authorization from Brazil's ANVISA for its single-dose chikungunya vaccine IXCHIQ®, marking the first approval of a chikungunya vaccine in an endemic country [1][2] - The vaccine is part of Valneva's strategy to enhance access in low- and middle-income countries (LMICs), supported by CEPI and the EU [1][6] - The approval allows for large-scale clinical trials in Brazil, including Phase 4 trials to gather additional data on vaccine effectiveness [3] Company Developments - IXCHIQ® is already approved in the EU for individuals aged 12 and older and in the U.S., Canada, and the U.K. for those aged 18 and older [2] - Valneva is collaborating with Instituto Butantan for local manufacturing and distribution of the vaccine in Brazil, with potential approval for another vaccine candidate, VLA1555, expected in mid-2025 [4] - The company aims to ensure rapid access to its vaccines in Brazil and other regional markets, addressing a significant public health need as Brazil reported over 1 million chikungunya cases since 2019 [5][6] Clinical Trials and Research - Valneva is conducting a Phase 2 trial in children aged 1 to 11 years in the Dominican Republic and Honduras, with positive results reported in January 2025 [7] - A pivotal Phase 3 study in children is expected to begin in Q4 2025, with plans to evaluate the vaccine in pregnant women in outbreak-affected countries [8] Public Health Context - Chikungunya virus, transmitted by Aedes mosquitoes, has caused significant outbreaks globally, with over 720,000 cases reported in the Americas from January to July 2023 [5][10] - The World Health Organization has identified chikungunya as a major public health issue, with the disease's economic impact expected to grow due to climate change [10]