Welcome to the forum. Sorry you’ve had to find your way here.
It’s good that you’re straight on Tysabri as it’s a great disease modifying drug (DMD). The point of DMDs is that they reduce the number and severity of relapses. Tysabri has an average relapse reduction rate of about 70%, which is great.
The big problem with Tysabri is that there have been so many stories told of people having improvements in their symptoms, even symptoms they’ve had for years (‘she came in for the first infusion in a wheelchair but now can walk with just a stick’, etc). It gives people an unrealistic expectation, and disappointment when they don’t have active improvements.
But that’s not it’s job. If you have no relapses, and just don’t have any increase in disability, then that’s a massive thing.
So, keep well, if you’ve got cognitive improvement, then that’s a big plus.