SD is testing at a rate of 9700 pM. That's better than about half of US states, about even with PA, well ahead of KS. Our death rate, as a proportion of total cases, is one of the lowest, which some here are attributing to clean air and climate (after an SD winter, anyone with a delicate constitution says holy fuck I'm getting out of here, so the long-term population tends to be selected in the direction of robust). I think it's also a matter of spacing - where crowding is rare and there's so much open space, your "viral load" is lower (the term means number of virus particles encountered during one exposure incident). Ceteris paribus, if your immune system meets up with a smaller dose of particles it has a better chance of developing enough antibodies before virus proliferates and causes a severe case.