Regeneron Pharmaceuticals Acquisition of Checkmate Pharmaceuticals  Regeneron Pharmaceuticals (REGN) announced a successful acquisition of Checkmate Pharmaceuticals, Inc., deepening its commitment to immuno-oncology. The firm has added a new modality to the company's portfolio of potential combination-ready approaches for difficult-to-treat cancers. Checkmate's lead investigational candidate, vidutolimod, is an advanced generation CPG-4 oligodeoxynucleotide toll-like receptor 9 . . . This content is for paid subscribers. Please click here …