Reuters -- European regulators have identified 31 cases of a potentially deadly brain infection in patients taking Biogen Idec Inc's (BIIB.O) multiple sclerosis drug Tysabri and recommended new measures for dealing with the risks of the drug.
Reuters -- European regulators have identified 31 cases of a potentially deadly brain infection in patients taking Biogen Idec Inc's (BIIB.O) multiple sclerosis drug Tysabri and recommended new measures for dealing with the risks of the drug.
