Originally Posted by
FireSprite 
Doesn't that completely negate the disease/genetic link theory? Doesn't that make it sound like a social disease? Hmmm..... maybe I'm overthinking but this sentence really sticks out to me.
I don't think that sentence was suggesting "causes"--it's just noting the fact that we are social animals and the disease hits us "where we live," so to speak. You could say the same thing about cancer and other illnesses--but some illnesses affect those around the sick person more than others.