Workers inside the Wuhan Institute of Virology in Wuhan, China, in 2017. Conspiracy theorists have conjectured the lab is the origin of the Covid-19 coronavirus outbreak; scientific evidence shows it’s not.
Credit: AFP via Getty

The signs that the small, scattered coronavirus outbreak in the United States could spiral into a larger-scale problem are growing. A new analysis, first reported by STAT, found there are likely now 500 to 600 (mostly undetected) cases of Covid-19, the disease caused by the coronavirus, in Washington state alone. “January 1 in Wuhan was March 1 in Seattle,” computational biologist Trevor Bedford, who did the analysis, told STAT, referring to the Chinese city where the virus emerged and began rapidly infecting humans.

The decisions federal and local public health officials make this week — to test more people with symptoms, inform the public about the risk, isolate the sick, and institute other measures — will be crucial. So will the speed at which they execute them.

This could be a make-or-break moment where US cases remain relatively low and […]

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