MS patients who developed PML and in whom serum samples were available 6-187 months prior to the onset of PML, all 45 patients had anti-JCV antibodies detected.
Samples were available from 73 patients at the time of PML diagnosis and all 73 tested positive for anti-JCV antibodies.
CoI: Data in this post has been supplied by Biogen-Idec as part of their "monthly natalizumab safety update and PML risk stratification programme".Labels: PML Risk update