My guess is the effect isn't very significant. Are there studies showing disease versus pet ownership? People are far more "clean" today than in the past and I

My guess is the effect isn't very significant. Are there studies showing disease versus pet ownership? People are far more "clean" today than in the past and I wonder how much our high standards for cleanliness make a difference. Some people feed their cats raw chicken intentionally. Dogs get into all sorts of things outside (carcasses, feces, etc) they can bring into a house. Personally, when I am backpacking or caving, I will eat food with dirty hands (as in caked in dirt and mud) and don't get sick from it. I occasionally drink untreated water as well, but typically try to avoid it from giardia risk.