Density is only part of the equation. There’s also the amount of travel Americans do. Not just internationally but short getaways.
Our neighborhood has more weekend rentals than not. There was an up tick in vacationers this last weekend. It explodes during spring break (next weekend) and doesn’t slow down until Labor Day through Thanksgiving. Every weekend we get another chance of catching CV. The people who live here permanently tend to leave to get away from the weekenders so they may bring CV back themselves.
If you’ve flown over the past two months, odds are, you’ve been exposed to the virus.