Truth be told, it was a rhetorical question. I cannot fathom what sort of mental gymnastics must be required for people in the US to tell themselves that they're through the first wave. To a foreigner, it's simply mind boggling and total wishful thinking.
Talking about state by state waves, why does this even matter if there are neighbouring states with high numbers, air transport is still running, and state borders remain open? It's just a long, drawn out, first wave ebbing and flowing around the entire country.
Australia has had states close borders using police and military. There are hotel quarantines for residents returning to the country and the national airline has grounded international flights. They had a couple weeks of zero or single digit infections throughout the states, now that marked the end of their first wave (and they have entered their second shortly after things loosened up a little). New York, which subsided to 700+ infections per day, that's not the end of a wave by any sane metric.
We're in a third wave out where I'm living. We went from single digits up to over a hundred a day for a week, now back down to sub 100.