I think it is important for family to know because I believe there is a familial predisposition to MS. I'm still disgusted that my cousin didn't tell anyone he had it and let the whole family think I was the only one for years.

As for friends my personal friends know but my work friends don't. I'm too afraid to have it become public knowledge because as in most professions it is a small world and I worry about not being hired in the future if people know.

If someone I meet casually happens to tell me they have it I always tell them I do also.