Genzyme-Sanofi Announcement February 17th 2011

The NPDG (UK) has received the following update from Annamarie Dillon, Patient Group Relations, Genzyme Europe

Sanofi-aventis have entered into an agreement under which Sanofi-aventis will acquire Genzyme. Sanofi-aventis is a global, diversified healthcare company, headquartered in Paris, France and a leader in diabetes, oncology, innovative medicines, vaccines, consumer health care products and animal health. With this transaction, Genzyme will move into a new phase of our development, continuing our patient-focused mission and developing treatments that change the lives of people with rare diseases.

Sanofi-aventis and Genzyme have a shared vision for our future together and believe we will emerge even better prepared to serve you. The plan is for Genzyme to become a division of Sanofi-aventis and global centre of excellence for rare diseases. We will continue to serve the rare genetic disease community as we have done for the past 30 years, and I believe that Sanofi-aventis will bring important new perspectives and new resources to this work.

Until the transaction closes, which is expected early in the second quarter of this year, both companies remain independent. Every aspect of how we work and our commitment to you remain the same.

I understand that this has been a very challenging time for the patient community. In partnership with you, Genzyme’s mission has always begun and ended with the patient. Sanofi-aventis is making a significant investment in Genzyme because they value what we do, and our mission will remain unchanged.

As we work through the details, we will share our progress with you. Our future is dependent upon the support and involvement of patients and the treatment community, and we are eager to hear your thoughts and feedback as well.

Thank you for your continued support of Genzyme, and we look forward to updating you soon on our progress and path forward.

Annamarie Dillon

Manager, Patient Group Relations

Genzyme Europe

To view a copy of the Press Release from Genzyme and Sanofi-aventis click here.

A note from Genzyme - January 2011:

Genzyme is continuing efforts to develop recombinant human acid sphingomyelinase (rhASM) for the potential treatment of the non-neurological manifestations of acid sphingomyelinase deficiency (ASMD, also known as Niemann-Pick disease Types A and B). After completing the Phase 1 clinical trial in 2009, we engaged regulatory authorities in discussion about plans for a Phase 2 clinical trial and conducted additional preclinical research in 2010. This regulatory dialogue is ongoing. We remain committed to the development of a therapy for ASMD and will keep the community informed once our regulatory discussions are complete and we can confirm a start date for the Phase 2 clinical trial for Niemann-Pick B patients.

We are pleased to note that an abstract from the Phase 1 clinical trial was selected for a podium presentation by Dr. Margaret McGovern at the 7th annual lysosomal disease network's WORLD conference, to be held in Las Vegas, February 16-18, 2011.

Genzyme Corporation
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www.genzyme.com