why does one identical twin get it, and the other steers clear? I have met several sets of ID twins, and only one has it. Why do several members of the same family do the exact same thing for the exact same amount of time, and yet, only one child in the family has it, or 5 out of 6 have it?

This disease is bizarre. My sister has abused herself to the point of being criminal. She has led a ragged life. She is healthy (not mentally) and is capable of living to be a very old lady. I led a better life, better education, higher standard of living, more services provided, and had better medical care, and yet, I got MS.