Lyon (France), February 13, 2026 – Valneva SE (NASDAQ:VALN, PARIS:VLA), a specialty vaccine company, today announced that following a review of the benefits and risks of the Company's single‑dose chikungunya vaccine, IXCHIQ^®, the United Kingdom's (UK) Commission on Human Medicines (CHM) has updated its recommendations for use of the vaccine.

The updated Prescribing Information (PI) will reflect these recommendations, which now include a restriction for individuals over 60 years of age, for people with specified health conditions, as well as timing of vaccination prior to travel. For further details please refer to this Link.

The MHRA confirmed that the benefit–risk profile of IXCHIQ^® remains favorable for individuals aged 18 to 59 years who are at risk of chikungunya infection and do not have the contraindicated underlying medical conditions.

The update follows MHRA's temporary suspension on the use of IXCHIQ^® in older individuals¹, which was based on reports of serious adverse events (SAEs), mainly in elderly people with significant underlying medical conditions during an outbreak vaccination campaign on the French island of La Reunion.

Valneva is committed to upholding the highest safety standards and will continue monitoring post marketing safety data of IXCHIQ^®and work in a collaborative way with all relevant authorities to potentially further update recommendations and restrictions of use, if justified.

About Chikungunya

Chikungunya virus (CHIKV) is a mosquito-borne viral disease spread by the bites of infected Aedes mosquitoes which causes fever, severe joint and muscle pain, headache, nausea, fatigue and rash. Joint pain is often debilitating and can persist for weeks to years². In 2004, the disease began to spread quickly, causing large-scale outbreaks around the world. Since the re-emergence of the virus, CHIKV has now been identified in over 110 countries in Asia, Africa, Europe and the Americas3. Between 2013 and 2023, more than 3.7 million cases were reported in the Americas³ and the economic impact is considered to be significant. The medical and economic burden is expected to grow with climate change as the mosquito vectors that transmit the disease continue to spread geographically. As such, the World Health Organization (WHO) has highlighted chikungunya as a major public health problem⁴.

About Valneva SE

We are a specialty vaccine company that develops, manufactures, and commercializes prophylactic vaccines for infectious diseases addressing unmet medical needs. We take a highly specialized and targeted approach, applying our deep expertise across multiple vaccine modalities, focused on providing either first-, best- or only-in-class vaccine solutions. We have a strong track record, having advanced multiple vaccines from early R&D to approvals, and currently market three proprietary travel vaccines. Revenues from our growing commercial business help fuel the continued advancement of our vaccine pipeline. This includes the only Lyme disease vaccine candidate in advanced clinical development, which is partnered with Pfizer, the world's most clinically advanced tetravalent Shigella vaccine candidate, as well as vaccine candidates against the Zika virus and other global public health threats. More information is available at www.valneva.com.

Valneva Investor and Media Contacts

Laetitia Bachelot-Fontaine

VP Global Communications & European Investor Relations

M +33 (0)6 4516 7099

laetitia.bachelot-fontaine@valneva.com

Joshua Drumm, Ph.D.

VP Global Investor Relations

M +001 917 815 4520

joshua.drumm@valneva.com

Forward-Looking Statements

This press release contains certain forward-looking statements relating to the business of Valneva, including with respect to regulatory approval of product candidates and review of existing products. In addition, even if the actual results or development of Valneva are consistent with the forward-looking statements contained in this press release, those results or developments of Valneva may not be sustained in the future. In some cases, you can identify forward-looking statements by words such as "could," "should," "may," "expects," "anticipates," "believes," "intends," "estimates," "aims," "targets," or similar words. These forward-looking statements are based largely on the current expectations of Valneva as of the date of this press release and are subject to a number of known and unknown risks and uncertainties and other factors that may cause actual results, performance or achievements to be materially different from any future results, performance or achievement expressed or implied by these forward-looking statements. In particular, the expectations of Valneva could be affected by, among other things, uncertainties and delays involved in the development and manufacture of vaccines, unexpected clinical trial results, unexpected regulatory actions or delays, competition in general, currency fluctuations, the impact of the global and European credit crisis, and the ability to obtain or maintain patent or other proprietary intellectual property protection. Success in preclinical studies or earlier clinical trials may not be indicative of results in future clinical trials. In light of these risks and uncertainties, there can be no assurance that the forward-looking statements made in this press release will in fact be realized. Valneva is providing this information as of the date of this press release and disclaims any intention or obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events, or otherwise.

¹ https://www.gov.uk/drug-safety-update/ixchiq-chikungunya-vaccine-temporary-suspension-in-people-aged-65-years-or-older

^[2] Reemergence of Chikungunya Virus

^[3] Vaccine and Therapeutic Options To Control Chikungunya Virus

^[4] Geographical expansion of cases of dengue and chikungunya beyond the historical areas of transmission in the Region of the Americas (who.int)

Attachment

2026_02_13_IXCHIQ_MHRA_Update_PR_EN_Final

Valneva Provides Update on Recommendations for Use of IXCHIQ® in the United Kingdom