BioNotebook: Former Sanofi CEO Viehbacher joins PureTech board; three venture financings, four deals and a dropped drug

It didn't take long for Chris Viehbacher to jump back in to the world of drug development, although by joining the board of directors of PureTech in Boston he's swimming at the opposite end of the biopharma pool from where he was as CEO of Sanofi back in October.