From my limited understanding of MS, it affects different people in different ways and at different times. Such as Jack was saying last night that he lost sight or had some kind of visual impact in one of his eyes for a time but that has since changed. He also mentioned a prior bout with his leg.
I have a few relatives with MS, one is doing quite well and the other not so much. The one who is not doing so well lives out of state and I don't talk to her much so I don't know as much as I would like on the subject. I'm just happy to see Jack doing so well and hope his good turn will continue.