Thank you for the information and the contact details!
Here is a very useful resource that I found very helpful, it is a girl who has MS and has been putting together small broadcasts on Youtube.com. She has been very positive about her treatment, and is currently receiving Tysabri by infusion. Apparently the problem with the lethal cases, the patients have been on other immuno suppressant medications at the same time, and there has been complications.
Hope this helps, if you have a chance I recommend you have a look at Lauren's broadcasts, she is so positive and really is helping so many PwMS.
The messages posted under each video are really good too!
http://www.youtube.com/watch?v=O5Cc8e9dQ84&feature=relatedRgds,
Ian