I was thinking along the same lines the other day Charlie, and was chuckling to myself. I was wondering what science was going to discover next about the body, and what diseases they were going link to it.
I could see how one persons blueprint could be more susceptable to a disease in relationship to thier environment compared to the next person. But as for being the cause I dont see it. For example someone with fair skin will burn easier under direct sunlight... but that doesnt make them genetically prone to sunburn disease.