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Sanofi Pasteur's Fluzone High-Dose Vaccine Significantly More Effective Than Standard Dose Fluzone Vaccine In Preventing Influenza In Adults 65 Years Of Age And Older

LYON, France, Aug. 26, 2013 /PRNewswire/ -- Sanofi Pasteur, the vaccines division of Sanofi (EURONEXT: SAN and NYSE: SNY), today announced topline results of a large-scale, multi-center efficacy trial in people 65 years of age and older showing a superior clinical benefit of Fluzone ® High-Dose (Influenza Virus Vaccine) relative to the standard dose of Fluzone vaccine in preventing influenza.

Today's announcement reflects the positive findings related to the primary endpoint for the study population. Further data analyses of secondary endpoints are ongoing, including an evaluation of the relative efficacy based on the match of the vaccine strains to circulating influenza virus strains. Sanofi Pasteur anticipates submitting the full clinical study report to the FDA for review by early 2014 and will seek a modification to the label for Fluzone High-Dose vaccine reflecting the superior efficacy data in adults 65 years of age and older.

"We are pleased that this study demonstrates the superior relative efficacy of Fluzone High-Dose vaccine compared to Fluzone vaccine in preventing influenza in older adults," said David P. Greenberg, M.D., Vice President, U.S. Scientific and Medical Affairs, Sanofi Pasteur. "This efficacy trial complements the previous evidence of superior immune responses for Fluzone High-Dose vaccine compared to Fluzone vaccine and reaffirms the Phase III safety data in this population that were the basis for FDA licensure of Fluzone High-Dose vaccine in 2009."

In the study, Fluzone High-Dose vaccine was 24.2 percent more effective in preventing influenza in adults 65 years of age and older than Fluzone vaccine. The results met the pre-specified primary objective of the study, demonstrating statistically superior efficacy for Fluzone High-Dose vaccine. Additionally, the study results suggested consistent clinical benefit across the study years, influenza virus types, clinical illness definitions, and laboratory methods of influenza confirmation. This large, multi-year trial also reaffirmed the safety of Fluzone High-Dose vaccine as demonstrated in previous studies.

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