Test your levels. You may be low jcv

My Doctor said they have had multiple MS patients on tysabri develop PML, still a very small % though. He advised that risk appears to go up after 2 years on Ty, I have been JCV+ since 6 months on. Now at 20th Infusionand the titer level is still relatively low but has gradually climbed at my next appt with MS specialist I will be exploring options at his suggestion

Up to doc but I wouldn't and don't think my doc would want me too. Hope this helps.

Thanx all for yor comments. I developed severe leg cramps and thought maybe that was the Tysabri.

I also tested positive for JC virus. Half the world has it. I flipped out. Found out after ceaseless research that there's been one case of PML in the world among ms patients! If your meds are working, don't stop because of your fear of PML!