I Am Visiting This Site To Learn About Tysabri. My

i am visiting this site to learn about Tysabri. My niece has MS and was given the dose for the first time and I am wondering and now I am learning about this product. I do not have MS but I am concerned about what is being given to her and how often she has to take this medicine. How many study groups been performed and what was the percentage of wellness came out of these studies. What was the percentage of wellnesses or errs of this product.