Valneva Withdraws BLA for Chikungunya Vaccine
Valneva says it has voluntarily withdrawn its BLA for Ixchiq, the company’s chikungunya vaccine, based on FDA safety-related restrictions on the product. In 8/2025, CBER suspended Valneva’s BLA due to serious safety concerns that the vaccine could be causing chikungunya-like illness in vaccine recipients. The vaccine was granted accelerated approval in 2023 for preventing disease caused by the chikungunya virus (CHIKV) in individuals 18 years of age and older who are at increased risk of exposure to CHIKV.
In 5/2025, FDA issued a safety communication that recommended a pause in the vaccine’s use in individuals 60 years of age and older while an investigation of postmarketing reports of serious adverse events was undertaken, including neurologic and cardiac events, in individuals who have received the vaccine.
Valneva says FDA has now placed a clinical hold on the company’s IND for the vaccine pending an investigation into a newly reported foreign serious adverse event. According to the company, the adverse event occurred outside the U.S. and involved a younger adult who received three vaccines at the same time, including the chikungunya shot. Valneva said the case may be plausibly related to vaccination, but that causality has not been established. The company said it has reported the case to the U.S. Vaccine Adverse Event Reporting System and other pharmacovigilance systems and is seeking additional information to further assess the incident.
Valneva said there are currently no clinical studies actively vaccinating participants with the chikungunya vaccine and that it plans to proceed with post-marketing clinical activities, subject to discussions with regulators. The company added that it is continuing to review the vaccine’s global commercial prospects based on medical need and market attractiveness.
Chikungunya is a mosquito-borne viral disease that causes fever and severe joint pain that can persist for months or years. Since its resurgence in the mid-2000s, the virus has spread widely across Asia, Africa, Europe and the Americas, with millions of cases reported in the past decade.