Additionally from the above link:
“In five major U.S. cities, as of March 1 there were only 23 confirmed casesof coronavirus.
But according to the Northeastern model, there could have actually been about 28,000 infections in those cities by then.”
[...]
“Other disease researchers said the findings of Dr. Vespignani’s team were broadly in line with their own analyses. The research offers the first clear accounting of how far behind the United States was in detecting the virus. And the findings provide a warning of what can recur, the researchers say, if social distancing restrictions are lifted too quickly.”
[...]
“And more cases may have been arriving in the United States by the day.
“Knowing the number of flights coming into New York from Italy, it was like watching a horrible train wreck in slow motion,” said Adriana Heguy, director of the Genome Technology Center at New York University’s Grossman School of Medicine.”
[...]
“A few cities with early outbreaks, notably Seattle, are believed to have avoided enormous growth later by heeding the models available at the time and taking action well ahead of the rest of the country.
“We knew the numbers we saw were just the tip of the iceberg, and that there were much greater numbers below the surface,” said Jenny A. Durkan, the mayor of Seattle, in an interview. “We had to act.”
A highway sign in Seattle on April 15.Credit...Ruth Fremson/The New York Times