So.....

Dumb question, if you can have a false negative JCV test, can you have a false positive one?

I only had one test, and that was positive and I am still on Ty - have been for nearly four years. Working well, don't want to change, don't want to go on orals (can't see the point if you can still get PML when you are on them if you used to use Ty). Wondering if I should ask for a repeat test if it is possible that it may be wrong.

Lyn