Thread: Tysabri Information and Check In part 2
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Old 03-11-2010, 06:17 PM
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Quote:
Originally Posted by komokazi View Post

The 1000 patient trial is a prospective study to prospectively determine the accuracy of the assay (blood test) relative to JC virus present in urine (PCR testing). They should be able to determine accuracy/market the assay after the initial tests of the 1000 patients.
Can you explain how they can determine the accuracy of the assay after testing 1,000 people? Don't you have to follow the people you test to see if those who test positive for JC virus get PML? Urine, blood, and spinal fluid may not show evidence of JC virus but it could be there, right? That's why we need the assay?
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