Biogen is a biopharmaceutical company focused on discovering, developing and delivering therapies for neurological and neurodegenerative diseases as well as related therapeutic adjacencies. Co. has a portfolio of medicines to treat multiple sclerosis (MS), spinal muscular atrophy (SMA) and Alzheimer's disease. Co. also commercialize biosimilars of biologics and focuses on improving its pipeline in neuroscience and immunology. Co.'s marketed products include TECFIDERA, VUMERITY, AVONEX, PLEGRIDY, TYSABRI and FAMPYRA for the treatment of MS; SPINRAZA for the treatment of SMA; ADUHELM for the treatment of Alzheimer's disease; and FUMADERM for the treatment of severe plaque psoriasis.