Guess, why so many have died of coronavirus in New York?

America's financial capital has 8.6 million inhabitants. There are 10,000 people per square kilometer, making it the densest city in the US. Millions of commuters brush up against each other on its packed subway system every day, while keeping distance on its sometimes narrow sidewalks can be difficult. American geneticists estimate that it started spreading there from Europe in February, before New York's first confirmed case on March 1.