I am curious since I am about to embark on the ty journey. I was reading about the newly discovered PML cases and Biogen's proposal that people take drug vacations. But I also read about how most people bounce right back into full swing attack mode when they stop the ty so that would make no sense to me. But once your start the ty is there a long term plan... say we are going to keep you on this treatment for X amount of time and then what? Do you stay on this drug forever?