Cherie,

Where there is smoke, there is usually fire! I sure hope that these are isolated cases for Tysabri users because the last thing MS patients using Tysabri need is to have another problem with this drug.

Any time you prevent one's immune system from operating the way it should, you have to keep a close watch on this kind of potential problem. The drug has been in general use for just over a year now so it's not surprising that this kind of incident is beginning to surface.

Harry