[randomstudent]

Probably not. Unlike MS, which is an autoimmune disease, ALS is not autoimmune. The exact cause is only known in some cases, but it seems to stem from problems with the machinery inside the cell, not an aggression by the immune system from outside the cell.

[amelius]

How about CFS?

[randomstudent]

Do you mean CSF instead (Cerebrospinal fluid)? I'm not qualified to answer that, sorry. But my best guess is that the problem is almost 100% intracellular.