Sanofi has decided to discontinue the clinical development of its proposed Clostridium difficile vaccine after an interim analysis concluded that the probability of the Phase 3 study meeting its primary objective was low.

The interim analysis was conducted by the Independent Data Monitoring Committee (IDMC).

The trial ‘Cdiffense’ was testing the efficacy and safety of a candidate toxoid vaccine in a subpopulation at risk of C. difficile infection. Sanofi is informing all investigators, regulatory authorities, trial ethics committees and study volunteers of their decision to stop the program. 

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Data that has been collected from the trial so far will be analyzed and shared with the scientific community in due time, according to a statement from the company. The statement continued on to say that the Company will focus its efforts on six separate vaccine projects currently in development. 

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