Thread: Tysabri Information and Check In part 2
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Old 11-15-2009, 12:33 AM
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Natalie8 Natalie8 is offline
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Join Date: Apr 2008
Posts: 900
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Can someone please explain why Biogen is now stating that the risk of PML is still 1:1000 from 24 to 36 months if only 13,000 people have taken the drug more than 24 months? I got the 13,000 number from an article dated Oct. 23. Haven't 18 of the PML cases been 24 months and over? Thanks!!!!
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