Ok acknowledged, but what's the point again? Aren't we trying to figure out if all of NYC has been infected by the virus or not? 20k deaths divided by fatalit

Ok acknowledged, but what's the point again? Aren't we trying to figure out if all of NYC has been infected by the virus or not? 20k deaths divided by fatality rate (give or take demographic breakdown) gets you the answer today as new cases/deaths are minimal (virus spread is minimal). You don't like that fatality rate, so be it, but which one you believe in is all that really matters for this exercise given the virus spread <-> delay till death is not a huge factor at the moment in NYC.