Alexion Pharmaceuticals Inc.'s progress in developing a next-generation successor for its aging blockbuster, Soliris (eculizumab) are being viewed in a positive light by analysts, who have been upbeat about late-stage clinical results released earlier this week involving the longer-acting successor, Ultomiris, in a second potential indication.
Top-line data from a Phase III study of Ultomiris (ravulizumab-cwvz) in complement-inhibitor naive patients with atypical hemolytic uremic syndrome (aHUS),...







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