Because they all live on top of each other and rode mass transit everyday.
Which is something the Left aching to impose on the rest of America.
Right. I think viral load may be the best predictor of who winds up with a serious case.
With high population density and heavy reliance on mass transit, my supposition is the cases that present in NYC tend to have much higher viral loads than the rest if the country.
If so, it couod easily explains their high mortality rate.