Valneva Voluntarily Withdraws Ixchiq Vaccine Applications
Valneva SE announced that the company has decided to voluntarily withdraw the biologics license application, BLA, and Investigational New Drug, IND, application for its chikungunya vaccine, Ixchiq, in the United States, following suspension of the license by the U.S. Food and Drug Administration, FDA, in August 2025. The Company had been awaiting further information with respect to its formal response to the vaccine license suspension. Valneva was recently informed of the FDA's further decision to now place the Investigational New Drug, IND, on clinical hold pending an investigation of a newly reported foreign Serious Adverse Event, SAE. There are currently no clinical studies involving Ixchiq that are actively vaccinating participants, and the Company intends to move forward with its planned post-marketing clinical activities, subject to further discussions with relevant regulatory authorities.
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Valneva Withdraws Ixchiq Vaccine Applications Amid FDA Hold
- Application Withdrawal: Valneva SE has voluntarily withdrawn its Biologics License Application (BLA) and Investigational New Drug (IND) application for the Ixchiq vaccine in the U.S. following the FDA's suspension of the license in August 2025 due to four reports of serious adverse events (SAEs) resembling chikungunya illness.
- Clinical Hold: The FDA has placed the IND for Ixchiq on clinical hold pending an investigation into a newly reported foreign SAE, resulting in no active clinical studies vaccinating participants, which significantly impacts the company's vaccine rollout strategy.
- Safety Assessment: Valneva is actively seeking additional information to further characterize the case related to Ixchiq vaccination, as the case may be plausibly linked to the vaccine, although causality has not been established, potentially affecting public confidence and market acceptance of the vaccine.
- Future Plans: Despite these challenges, Valneva intends to continue discussions with health authorities in all territories where Ixchiq is licensed and plans to advance post-marketing clinical activities, while also looking forward to submitting a Biologics License Application for the Lyme disease vaccine candidate VLA15 in collaboration with Pfizer in 2026.

Valneva SE Withdraws Chikungunya Vaccine Applications, Shares Drop 7.7%
- Vaccine Withdrawal: Valneva SE has withdrawn its BLA and IND applications for the IXCHIQ Chikungunya vaccine due to an FDA suspension and review of new serious adverse events, leading to a 7.7% drop in pre-market trading to $9.29, indicating market concerns over its product prospects.
- Market Decline: U.S. stock futures are broadly lower, with Dow futures falling around 700 points, reflecting investor caution regarding economic outlook, which may impact overall market sentiment and exacerbate volatility in other stocks.
- Other Stock Movements: Shares of Rezolve AI PLC and POET Technologies Inc fell 15% and 11.2% respectively in pre-market trading, indicating widespread investor apprehension towards tech stocks, potentially prompting a reassessment of risk appetite.
- Tesla Update: Tesla's stock fell 2.7% to $425.75 in pre-market trading, despite CEO Elon Musk confirming that vehicles equipped with the AI4 chip will achieve unsupervised autonomous driving, suggesting insufficient market confidence in the electric vehicle sector.






