I just came on Neurotalk to post something about BG-12 (Tecfidera) and PML but I see you already beat me to it! This is very sobering and scary news.

Here is another article on the issue which I think does a very good job of explaining the problem. There are a couple of neurologists in the article who state the risk of PML should be of concern.

http://www.everydayhealth.com/multip...6pLid%3D304022