Seasonal influenza virus vaccine quadrivalent (Sanofi Pasteur)

Two combination vaccine candidates for prevention of influenza and COVID-19 granted Fast Track designation in the US First non-mRNA combination vaccine candidates that include two already licensed vaccines to prevent influenza and COVID-19 infectionsTwo phase 1/2 clinical studies are ongoing to evaluate the safety profile and immune response induced by the combination vaccine candidates Paris, December 11, 2024. The US Food and Drug Administration has granted Fast Track designation to two Sanofi combination vaccine candidates to prevent influenza and COVID-19 infections in individuals 50 years of age and older. Both candidates combine two already licensed and authorized vaccines with proven efficacy through randomized controlled studies, and with favorable tolerability. The first combination vaccine candidate (NCT06695117) consists of the influenza protein-based trivalent vaccine Fluzone High-Dose combined with the adjuvanted recombinant Novavax COVID-19 vaccine. The second candidate (NCT06695130) combines the influenza recombinant protein-based trivalent vaccine Flublok with the Novavax COVID-19 vaccine. Both Fluzone High-Dose and Flublok have been proven to prevent more influenza infections in older adults than standard-dose influenza vaccines in pivotal randomized clinical studies. Additionally, in real-world evidence studies they have demonstrated significant and consistent reductions in flu-related hospitalizations. The Novavax COVID-19 vaccine has been shown to have a better tolerability profile than currently available mRNA COVID-19 vaccines when administered as a booster dose. It has also demonstrated high efficacy against COVID-19 as primary vaccination in two pivotal phase 3 studies. Thomas TriompheExecutive Vice President, Vaccines, Sanofi“Building on our immunology expertise and on 12 years of robust clinical and real-world data, we aim to continue leading the way in protection against flu and its severe outcomes. Our goal is to develop a combined flu and COVID-19 vaccine that offers simpler scheduling and fewer injections without compromising on the industry leading levels of efficacy, safety and tolerability of the standalone vaccines included in our combination vaccine.” Fast Track designation was granted based on the potential for the combination vaccine candidates to address the significant individual and healthcare system burden of two serious illnesses that can result in hospitalization and death, particularly among older adults. Sanofi has initiated two separate phase 1/2 parallel, randomized, modified double-blind, multi-arm studies (NCT06695117 and NCT06695130) to evaluate the safety and immune response induced by the two combination vaccine candidates. About NCT06695117 and NCT06695130The two combination vaccine candidates consist of: NCT06695117: TIV-HD (FLUZONE High-Dose) combined with NVXC19 (Novavax COVID-19 vaccine) to prevent Influenza subtype A, influenza subtype B and coronavirus (SARS CoV-2) infections in individuals 50 years of age or older.NCT06695130: RIV3 (FLUBLOK) combined with NVXC19 (Novavax COVID-19 vaccine) to prevent Influenza subtype A, influenza subtype B and coronavirus (SARS CoV-2) infection in individuals 50 years of age or older. One recent systematic review and meta-analysis suggests a combination booster vaccine could increase the uptake of COVID-19 vaccines among the 50 years and above age group by 56%. Combination vaccines may also be attractive to healthcare professionals conducting immunization programs as they may be easier and quicker to administer with fewer injections to protect against multiple diseases, less errors and decreased syringe and vial disposal requirements. Influenza (flu) is a contagious, acute viral respiratory disease. Every year, there are an estimated 290,000 to 650,000 influenza-related respiratory deaths globally. In developed countries most deaths associated with flu occur in people aged 65 years or older. Adults aged 65 or older account for most hospitalizations from flu. Among this population there is a higher hospitalization rate for flu with 2-fold longer average length of hospital stay than with younger adults. One quarter of patients are readmitted to hospital within 90-days post-discharge. Flu can wreak havoc across major organ systems. It can lead to an 8-fold increased risk of stroke and pneumonia, a 10-fold increased risk of heart attack and among older adults hospitalized for flu, 1 in 5 experience a decline in their ability to independently undertake simple daily tasks, such as bathing, and dressing themselves. Coronavirus disease (COVID-19) is an infectious disease caused by the SARS-CoV-2 virus. Most people infected with the virus will experience mild to moderate respiratory illness and recover without requiring special treatment. However, some will become seriously ill resulting in hospitalization and death. Many individuals continue to experience long-term sequelae following COVID-19, also referred to as “long COVID”. Long COVID symptoms can vary from mild to severe, potentially necessitating extensive medical attention, and may even lead to disability. A meta-analysis of 12 studies shows that 30% of COVID-19 patients have persistent symptoms two years after infection, the most common of which are fatigue, cognitive problems, and pain. About SanofiWe are an innovative global healthcare company, driven by one purpose: we chase the miracles of science to improve people’s lives. Our team, across the world, is dedicated to transforming the practice of medicine by working to turn the impossible into the possible. We provide potentially life-changing treatment options and life-saving vaccine protection to millions of people globally, while putting sustainability and social responsibility at the center of our ambitions.Sanofi is listed on EURONEXT: SAN and NASDAQ: SNY Media RelationsSandrine Guendoul | + 33 6 25 09 14 25 | sandrine.guendoul@sanofi.com Evan Berland | +1 215 432 0234 | evan.berland@sanofi.comNicolas Obrist | + 33 6 77 21 27 55 | nicolas.obrist@sanofi.com Léo Le Bourhis | + 33 6 75 06 43 81 | leo.lebourhis@sanofi.comVictor Rouault | + 33 6 70 93 71 40 | victor.rouault@sanofi.com Timothy Gilbert | + 1 516 521 2929 | timothy.gilbert@sanofi.com Investor RelationsThomas Kudsk Larsen |+ 44 7545 513 693 | thomas.larsen@sanofi.comAlizé Kaisserian | + 33 6 47 04 12 11 | alize.kaisserian@sanofi.com Felix Lauscher | + 1 908 612 7239 | felix.lauscher@sanofi.comKeita Browne | + 1 781 249 1766 | keita.browne@sanofi.com Nathalie Pham | + 33 7 85 93 30 17 | nathalie.pham@sanofi.comTarik Elgoutni | + 1 617 710 3587 | tarik.elgoutni@sanofi.comThibaud Châtelet | + 33 6 80 80 89 90 | thibaud.chatelet@sanofi.com Sanofi forward-looking statementsThis press release contains forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995, as amended. Forward-looking statements are statements that are not historical facts. These statements include projections and estimates regarding the marketing and other potential of the product, or regarding potential future revenues from the product. Forward-looking statements are generally identified by the words “expects”, “anticipates”, “believes”, “intends”, “estimates”, “plans” and similar expressions. Although Sanofi’s management believes that the expectations reflected in such forward-looking statements are reasonable, investors are cautioned that forward-looking information and statements are subject to various risks and uncertainties, many of which are difficult to predict and generally beyond the control of Sanofi, that could cause actual results and developments to differ materially from those expressed in, or implied or projected by, the forward-looking information and statements. These risks and uncertainties include among other things, unexpected regulatory actions or delays, or government regulation generally, that could affect the availability or commercial potential of the product, the fact that product may not be commercially successful, the uncertainties inherent in research and development, including future clinical data and analysis of existing clinical data relating to the product, including post marketing, unexpected safety, quality or manufacturing issues, competition in general, risks associated with intellectual property and any related future litigation and the ultimate outcome of such litigation, and volatile economic and market conditions, and the impact that pandemics or other global crises may have on us, our customers, suppliers, vendors, and other business partners, and the financial condition of any one of them, as well as on our employees and on the global economy as a whole. The risks and uncertainties also include the uncertainties discussed or identified in the public filings with the SEC and the AMF made by Sanofi, including those listed under “Risk Factors” and “Cautionary Statement Regarding Forward-Looking Statements” in Sanofi’s annual report on Form 20-F for the year ended December 31, 2023. Other than as required by applicable law, Sanofi does not undertake any obligation to update or revise any forward-looking information or statements. All trademarks mentioned in this press release are the property of the Sanofi group. Attachment Press Release

Sanofi's flu vaccine manufacturing hiccup in China, DualityBio's proposed Hong Kong IPO and UCB's $680 million sale of some Chinese assets made our news this week. Sanofi has suspended distribution of its two flu vaccines in China out of concern of waning potency. BioNTech's antibody-drug conjugate partner, DualityBio, has filed for a Hong Kong IPO. UCB will offload some Chinese assets for $680 million. And more.1. Sanofi halts flu vaccine distribution in China over fear of declining potencySanofi has temporarily stopped selling its two flu vaccines, Vaxigrip and VaxigripTetra, in China after a routine quality follow-up test flagged a decline in the vaccines’ potency in doses that were not yet distributed. The company attributed the problem to “unexpected circumstances” at the company’s production line in Shenzhen, China, which supplies doses only for the Chinese market.2. Duality plans Hong Kong IPO to fund trials of BioNTech-partnered ADCs and beyondChina’s Duality Biotherapeutics has filed for a Hong Kong IPO. The antibody-drug conjugate specialist set up shop in 2019 and has attracted deals with BioNTech, BeiGene and Adcendo that could be worth more than $4 billion combined. Duality named BioNTech-partnered ADCs targeting HER2 and B7-H3 as its “core products,” with the HER2 program nearing a potential application for accelerated approval in 2025.3. UCB sells off production plant and a clutch of older meds in China for $680MAnother foreign company is trimming its business in China. UCB is selling off its mature neurology and allergy brands in mainland China, plus a manufacturing site in the Chinese city of Zhuhai, to investment shops CBC Group and Mubadala for $680 million. The Belgian company will instead explore the launch of novel medicines in immunology, neurology and rare diseases in China, UCB CEO Jean-Christophe Tellier said.4. FDA weighs limiting PD-1 drugs in stomach cancer, calls on experts to discuss Merck, BMS and BeiGene medsThe FDA will hold an advisory committee meeting to discuss whether approvals for PD-1 inhibitors in advanced gastric and gastroesophageal junction adenocarcinoma and esophageal squamous cell carcinoma should be restricted based on tumors’ PD-L1 expression. BeiGene’s two open applications for Tevimbra, plus existing approvals for Merck’s Keytruda and Bristol Myers Squibb’s Opdivo, will be examined closely.5. As sales climb, Jazz's Epidiolex falls short in Japanese study in treatment-resistant epilepsiesA phase 3 Japanese study of Jazz Pharma’s cannabinoid drug Epidiolex has failed on the primary endpoint measuring seizure frequency in certain patients with treatment-resistant epilepsies. Still, the company pointed to numeric improvements across primary and secondary endpoints, as well as the drug’s overall global data, saying it plans to speak with Japanese authorities about a potential filing.6. Ipsen sues CSPC Pharma to block rival to cancer drug Onivyde (Bloomberg Law)Ipsen has filed a patent infringement lawsuit against China’s CSPC Pharma. The lawsuit centers on Ipsen’s Onivyde, a liposome formulation of the chemotherapy irinotecan, and CSPC’s irinotecan liposome candidate, which was filed with the FDA in late 2023 for previously treated pancreatic cancer. Ipsen alleges that CSPC steps on its new patent, which was issued Aug. 13, according to the complaint (PDF).Other News of Note:7. Bora's expansion tear continues as CDMO takes up stake in Tanvex, gains manufacturing capabilities8. With new focus, Kyowa Kirin pulls decades-old breast cancer drug Fareston from US market9. Bharat Biotech to launch oral cholera vaccine developed in partnership with Hilleman Labs (release)10. Tech company Fujitsu partners with Paradigm Health to boost clinical trials in Japan11. YolTech sells China rights to cholesterol gene editing therapy to Salubris for $29M12. API maker Global Calcium stung with Form 483 filing after FDA inspection of Indian plant