I was reading an article a couple of months ago arguing splitting American households into two groups (with every member of a given household in the same group) and then having Group A and Group B alternate between going to work,school,etc vs isolation every two weeks would drop our R_0 < 1, which would eventually kill off the pandemic in our borders. But we'd have to allow no one in through our border period (fat chance) until having a vaccine (and who knows if that'll ever come and when if it does) and hard to see 50 states signing off on that. I think it was in the NY Times.