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Biogen Idec Pays Elan $3.25 billion For Tysabri. Do We Leave, Or Stay?

  Wednesday, February 06, 2013

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Elan's Choices

  Saturday, April 16, 2011

Biogen Idec (BIIB) announced positive results of a process aimed at Identifying high-risk patients for a life-threatening side effect of prolonged use of the multiple sclerosis drug Tysabri. This test is a necessity because it detects an antibody that points to the presence of the Polyomavirus JC (JC virus), which causes the life-threatening progressive multifocal leukoencephalopathy (PML). This side effect in one per thousand patients has deprived Elan from billions of dollars in expected sales of Tysabri.  More...


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