MedImmune and Sanofi Pasteur to jointly develop and commercialise respiratory syncytial virus monoclonal antibody

LONDON, 03-Mar-2017 — /EuropaWire/ — MedImmune, the global biologics research and development arm of AstraZeneca, and Sanofi Pasteur, the vaccines division of Sanofi, today announced an agreement to develop and commercialise MEDI8897 jointly. MEDI8897 is a monoclonal antibody (mAb) for the prevention of lower respiratory tract illness (LRTI) caused by respiratory syncytial virus (RSV), the most prevalent cause of LRTI among infants and young children. MEDI8897 is currently in a Phase IIb clinical trial in pre-term infants who are ineligible for Synagis, the current standard of care medicine, and the development plan includes a proposed Phase III trial in healthy full-term and late pre-term infants.

Under the terms of the global agreement, Sanofi Pasteur will make an upfront payment of €120 million and pay up to €495 million upon achievement of certain development and sales-related milestones. The two companies will share all costs and profits equally. MedImmune and AstraZeneca will continue to lead all development activity through initial approvals, and AstraZeneca will retain MEDI8897 manufacturing activities. Sanofi-Pasteur will lead commercialisation activities for MEDI8897.

Bahija Jallal, Executive Vice President, MedImmune, said: “By combining our development expertise and leadership in RSV with Sanofi Pasteur’s significant global experience in commercialising paediatric vaccines we hope to provide an RSV disease prevention approach for all infants, both term and pre-term. This agreement supports  our focus on our three main therapy areas, while delivering value from the innovative science in our pipeline through partnerships.”

AstraZeneca’s commitment to the prevention of paediatric RSV disease will also continue through Synagis, the only medicine currently approved for the prevention of serious lower respiratory tract disease caused by RSV in pediatric patients at high risk of severe RSV disease.

Financial considerations
AstraZeneca will maintain a direct ongoing interest in MEDI8897 through the alliance. Revenue from the agreement, including the upfront payment of €120 million and up to €495 million in milestone payments, will therefore be reported as Externalisation Revenue in the Company’s financial statements. The agreement was completed at signing and does not impact AstraZeneca’s financial guidance for 2017.


About Respiratory syncytial virus
Respiratory syncytial virus (RSV) is the most common cause of lower respiratory tract infections among young children in the United States and worldwide. Most infants are infected before the age of one, and virtually everyone gets an RSV infection by the age of two.

Each year, on average, in the United States alone, RSV leads to:

  • 57,527 hospitalisations among children younger than 5 years old
  • 2.1 million outpatient visits among children younger than 5 years old
  • 177,000 hospitalisations and 14,000 deaths among adults older than 65 years

Source: Centres for Disease Control and Prevention, US Department for Health and Human Services,

About MEDI8897
MEDI8897 is a highly potent monoclonal antibody (mAb) that neutralises RSV by binding the RSV fusion (F) protein expressed on virions and infected cells and has been engineered to have a long half-life, so that only one dose will be needed for the entire RSV season. It is being developed for the passive immunisation of a broad infant population. MEDI8897 is currently being tested in a Phase IIb trial in preterm infants ineligible for Synagis. The current development plan includes a Phase III trial in healthy full-term and late preterm infants. MEDI8897 has received Fast Track designation from the FDA.

About MedImmune
MedImmune is the global biologics research and development arm of AstraZeneca, a global, innovation-driven biopharmaceutical business that focuses on the discovery, development and commercialization of small molecule and biologic prescription medicines. MedImmune is pioneering innovative research and exploring novel pathways across Oncology, Respiratory, Cardiovascular & Metabolic Diseases, and Infection and Vaccines. The MedImmune headquarters is located in Gaithersburg, Md., one of AstraZeneca’s three global R&D centres, with additional sites in Cambridge, UK and Mountain View, CA. For more information, please visit

About AstraZeneca
AstraZeneca is a global, science-led biopharmaceutical company that focuses on the discovery, development and commercialisation of prescription medicines, primarily for the treatment of diseases in three main therapy areas – Oncology, Cardiovascular & Metabolic Diseases and Respiratory. The Company also is selectively active in the areas of Autoimmunity, Neuroscience and Infection. AstraZeneca operates in over 100 countries and its innovative medicines are used by millions of patients worldwide. For more information, please visit and follow us on Twitter @AstraZeneca.


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