"Right now, the risk of PML in patients treated with [Tysabri] for more than two years is about one in 75 patients. That's a very high risk," said study author Eugene Major, a senior investigator at the U.S. National Institute of Neurological Disorders and Stroke (NINDS) in Bethesda, Md.
MSUK wrote:Researchers report drug mobilizes a kind of cell easily infected by a virus that attacks the brain.
Researchers report that they think they have figured out why patients who take the multiple sclerosis drug Tysabri face a high risk of developing a rare, and sometimes fatal, brain infection....... Read More - http://www.ms-uk.org/tysabri
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