MrsD,
Plus, I just read one of your earlier posts that indicate contaminants are a big contributor and that military bases are the worst places. I do find it interesting that I lived on military bases most of my life. My father was a career soldier, and then I spent 20 years in the Army myself.
And unfortunately, I also remember running thru the ddt fogs in the neighborhoods on many a summer evening
Probably additional contributors to all of this,