Gene study shows how coronavirus swept through the Diamond Princess

U.S. News & World Report: The fate of more than 3,600 quarantined passengers and crew on the cruise ship Diamond Princess made headlines in the early weeks of the coronavirus pandemic in February. An outbreak aboard the ship eventually led to nearly 700 infections and seven deaths from COVID-19. Now, a genetic retracing of events shows the outbreak likely stemmed from just one infected person, with the virus spreading rapidly as people mingled at crowded shipboard events, Japanese researchers report.

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