PS...not really sure of what you meant, but, in the US it was running rampant long before testing.....
But, you would suspect they would have caught up during the initial response and lockdowns.
We had it under control, but some bungling has let it loose in one state, it has spread far and wide very quickly and states locking borders again.
It is very contagious, or, some strains are, there is no way you can get lower testing results if you do not first isolate those with it or any sign of any sort of mild sniffle or sore throat etc.
In other words, it is out of control there, you can only aim to slow it.
Our cases are accelerating, so far, they are managing too track and trace, we will see in a few weeks if it is under some control or out.....but our states all agree, so we will all get a crippling lockdown most likely if scenario 2.