Multiple sclerosis: BIIB’s Tysabri gets FDA O.K. on test, label change
Multiple sclerosis patients using Biogen Idec (NASDAQ:BIIB) drug Tysabri now have access to the first test that can help determine their risk for developing a rare but potentially fatal brain infection that affects some patients using the drug. The U.S. Food and Drug Administration today cleared the blood test which can help doctors determine whether […]