Thanks for the interesting comments

I have printed out the JAMA paper, and will try to digest it. I think I will probably give a copy to my doctor, too.

I also like Julie’s theory. To me, it makes a lot more sense that inflammation could be reduced quickly, rather than myelin regrow quickly.

If this is the case, it means you should really be treated quickly when you start to experience symptoms (or, in my case, the ever-present symptoms get worse).