Greta has given you sound advice.

I am on the other end of the spectrum . . . there is no one on either side of my family who's had MS, and my mom had 300+ blood relatives. My dad was an only child, but none of his extended family has had it either. I'm just lucky, I guess.

If it deos not have some genetic component, it may be that families tend to be exposed to similar environmental factor(s) (triggers). Sometimes we are just more susceptible to certain disease, like with cancers . . .

Either way, your grandma's medical history is virtually irrelevant. If you have MS, you have it.

Cherie