Hi Sally, thanks for checking in and asking! I love my Tysabri. I haven't had a relapse yet since my diagnosis in Sept. 2007. I started Tysabri in June 2008. I attribute my quiet MS to the drug. I feel fortunate --tested negative for the JC virus antibodies. But I saw my doctor last week and it has been 6 months since I got tested. He wants me to have a second test. I have to confess it scares the crap out of me, to have it again! If I do test positive this time (either because the first one was a false negative or because I actually caught the virus since then) I will be switching to Gilenya. The negative test gave me such incredible peace of mind. I stopped worrying about PML and stopped scouring the internet obsessively for Tysabri updates. I don't want to go back to that.
Cheers!!