https://www.nytimes.com/2020/05/07/u...-outbreak.html
Travel from New York City seeded wave of U.S. outbreaks
https://www.seattletimes.com/nation-...u-s-outbreaks/
The findings are drawn from geneticists’ tracking signature mutations of the virus, travel histories of infected people and models of the outbreak by infectious disease experts.
“We now have enough data to feel pretty confident that New York was the primary gateway for the rest of the country,” said Nathan Grubaugh, an epidemiologist at the Yale School of Public Health.
The central role of New York’s outbreak shows that decisions made by state and federal officials — including waiting to impose distancing measures and to limit international flights — helped shape the trajectory of the outbreak and allowed it to grow in the rest of the country.
The city joins other densely populated urban hot spots around the world, starting with Wuhan, China, and then Milan, that have become vectors for the virus’s spread.