Once a rarity, billion-dollar deals are now coming fast and furious. Now three have appeared in only a few days. Gene therapy developer Voyager Therapeutics Inc. and Neurocrine Biosciences Inc. continued a longstanding partnership by agreeing to develop treatments for neurological diseases and for three new programs with rare CNS targets. Cytomx Therapeutics Inc. and Moderna Inc. entered a deal worth a potential $1.24 billion to Cytomx for generating and developing treatments in oncology and non-oncology. In the third deal, Royalty Pharma plc acquired an interest in Ionis Pharmaceuticals Inc.'s royalty in Biogen Inc.'s Spinraza (nusinersen) and Novartis AG's pelacarsen for up to $1.125 billion.