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JVC positive so they said only two years cause after that the risk goes up for getting the virus.

I am also worried about "tysabri rebound". Anyone had any experience with this?

I have tried copaxone and rebif, but neither one work. Then, I started tysabri. It has worked great, no new lesions or relapses! The bad part is I have hit my two year mark and now have to switch to a new med. Any suggestion as to what might work the same as the tysabri?