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I have heard that the risk of pml seems to decrease after 3-4 years and wonder if there have been any studies about that. my last research found no evidence after 5 years with tysabri. i know there were cases of PML after 4 years. The lady who got pml started tysabri with me in november 2008. she s...

in november 2013 i sum up 5 years with tysabri. I am positive to the virus since the 2ng infusion. I now read here it may cause atrophy of neurons in the mri scan and i have grey matter in my last mri scan. i have no alternative. Before tysabri i had 7 relapses per year, bad ones. vomiting, stroke s...