For now. They will have second/third waves. We’re not going to cure this before we reach herd immunity. New Zealand just delayed the inevitable (which is what flattening the curve is all about: delay infections enough so that we can reasonably treat)
And there might not be a second/third wave. Some countries observe the virus weakening. People who would've died two months ago if they caught it are now showing milder symptoms. We have 80 year olds now who would need a ventilator two months ago recovering completely as per some doctors from Europe (Italy, Serbia).
America needs to secede from North America and close all airports and seaports...