Scientists revise timeline for coronavirus’ rise

Coronavirus spread map
This visualization shows the routes by which variants of coronavirus are thought to have come into the U.S. and Europe. (Nextstrain Graphic)

Epidemiologists are coming around to the view that the first confirmed case of COVID-19 in the U.S., involving a Snohomish County traveler who got sick in mid-January, may not have been the one that touched off the West Coast’s coronavirus outbreak.

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By Alan Boyle

Mastermind of Cosmic Log, contributor to GeekWire and Universe Today, author of "The Case for Pluto: How a Little Planet Made a Big Difference," past president of the Council for the Advancement of Science Writing.

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