A test tube is seen in front of displayed Biogen logo in this illustration taken on, December 1, 2021.Biogen on Thursday reported second-quarter earnings and revenue that topped estimates and hiked its full-year guidance, as the company's cost cuts showed progress and sales of its breakthrough Alzheimer's drug, Leqembi, and other new products beat expectations. Biogen now expects full-year adjusted earnings to come in at $15.75 to$16.25 per share, up from a previous forecast of $15 to$16 per share.The bio ...