I think NYC will probably just slow walk their testing and test reporting...
Whats going to be interesting is to see what measures the government takes to maintain control. I find the people in NYC and LA to be much more selfish, angry, and without a morale compass than the majority of Americans.
When the panic hits, people will be dangerous. Id much rather be in Oklahoma or Missouri when the canned food is all gone off the shelves.
Cities will be nowhere to be near when this hits.