Well I guess I should start out letting you know who all have fms in our family. I have it my mother had it, my niece has it, my daughter has it also, my sister in-law has it her mom has it and we have two non-related friends who have it. Well the other day my brother was at a dr visit at his neurologist he announced that he had fms, we had no idea his regular dr who believes in fms never said anything. But one of the dr.'s that my sister in-law sees says that being around someone with fms can cause you to get it also even if they are not family. But of course you may not want to tell any new friends unless you want to keep them from gettting it.