CAMBRIDGE, Mass.--(BUSINESS WIRE)--Genzyme, a Sanofi company (EURONEXT: SAN and NYSE: SNY), today announced its support of International Rare Disease Day with a series of events to celebrate and recognize the global rare disease community. Observed annually on the last day of February, Rare Disease Day seeks to call attention to rare diseases as an important public health issue, and to bring widespread recognition of increased need for education, research and treatment.