Pharmaceutical Company Confirms Two Cases Of PML In People With MS Taking Tysabri August 6, 2008
A report from Biogen Idec has confirmed two further cases of progressive multifocal leukoencephalopathy (PML) in people with multiple sclerosis (MS) in the EU. The first person had an aggressive form of MS and had been taking Tysabri for approximately 17 months. They are now in a stable condition at home.

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