Yes, NY is clearly is densely populated. I guess I would look for the differences with California.
LA has more people (13.2 million) but appears to be less densely populated with 550 people per sq mile.
I didn’t follow California but I know Florida was offered as a place that not locking down worked.
I can look into it a little more. Florida has a lot of cases, and most came after the first wave. The same with Texas.
https://en.wikipedia.org/wiki/List_of_metropolitan_statistic...
...with a density of 1004 people / sq. mi., compared to the NY metro area with a density of 5313 people / sq. mi..
https://en.wikipedia.org/wiki/Miami_metropolitan_area
https://en.wikipedia.org/wiki/New_York_metropolitan_area#com...