Daisy is right, as far as I remember from statistics read. The vast majority of all people in America (can't speak for abroad, probably the same) have endured EBV, sometimes referred to as "mononucleosis". I had it in college, a typical place to get it. Later, it
was shown to have left a signature on a viral screen test.

Nevertheless it could be one of the triggers for MS, but most people fight it off and don't get MS from it. I remember I had a big boil on my neck from it, but when I got over it, it was gone for good.

And I had MS symptoms before I had EBV.