I found this video when I was looking around before my lemtrada R1 and found it pretty interesting.
I work with some very knowledgeable people (in the Drug Discovery/Pharma space) who admit very little is known about gut bacteria and its effect on the body. This obviously makes sense for those who manage MS through diet/lifestyle.
Maybe as more and more is discovered about the microbiome, certain dieases could be controlled more easily. Enjoy!