FDAnews
www.fdanews.com/articles/134506-biogen-8217-s-ms-drug-linked-to-10-more-brain-infection-cases

Biogen’s MS Drug Linked to 10 More Brain Infection Cases

February 22, 2011
Biogen Idec Inc. has disclosed that 10 more patients taking the multiple sclerosis drug Tysabri have contracted the rare brain infection known as PML.
Mass High Tech