French drugmaker Sanofi ousted CEO Paul Hudson on Thursday, ending a six-year tenure marked by a stalled drive to replace blockbuster drugs going off ​patent and rising pressure from U.S. anti-vaccine policy ​and rhetoric. The company said it had ​appointed Belén Garijo, the head of German drugmaker Merck KGaA , as new chief executive, adding that the 65-year-old Spanish executive would take over in late April. Sanofi shares fell nearly 6% on Thursday, with some analysts pointing to Garijo's