I was tested for the JC V antibodies when I went on Tysabiri. I tested a low positive. After a year on Tysabiri, my numbers started to climb so my neurologist took me off. I just started Ocrevus and didn't realize it had similar issues until the stuff was already going into my arm. I'm going to ask my neurologist about this on Tuesday but I am curious why he didn't mention it before I started the treatment.

they say you can get jv after infusion but is very rare

I think people tend to go on it if they are jcv positive... If I'm not mistaken