It started two months ago, just north of Seattle. A young man who had returned from China tested positive for the coronavirus, the first known case in the United States.
At first, the virus was detected only in a handful of cases, and mostly in those who had traveled outside the United States.
There were lone patients in Arizona, in Massachusetts, in Wisconsin. Married couples in Illinois and California were infected. Groups of Americans evacuated from overseas received treatment in California, Nebraska and Texas.
But in the past three weeks, everything has changed. As testing expanded and the virus spread, cases have been confirmed by the dozens, then by the hundreds and thousands.
By Friday night, more than 17,000 cases of the coronavirus had been detected across all 50 states and Washington, D.C., and more than 200 people had died. New York, California and Washington State have been the hardest hit.
Number of New Confirmed Cases Each Day
State
123
Total
cases
New cases
each day
Date of first case
The climb in the number of cases has been rapid, in part because of more testing. This week saw five times more cases than the previous one, more than 6,000 of which were in New York, which has the most cases in the country.
See our maps tracking the coronavirus outbreak around the world.
Source Article from https://www.nytimes.com/interactive/2020/03/21/us/coronavirus-us-cases-spread.html
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