Biogen Inc. announced that Alfred ?Al? W. Sandrock, Jr., M.D., Ph.D., Head of Research & Development, will retire from the Company effective December 31, 2021. Priya Singhal, M.D., M.P.H., Head of Global Safety and Regulatory Sciences, also with oversight responsibility for Japan and China R&D, will assume Dr. Sandrock?s duties as Head of Research & Development on an interim basis until a permanent successor is identified.