Cases of the novel coronavirus (2019-nCoV), which originated in China, have now spread to Japan, Thailand, South Korea, Singapore, and the United States. Over 557 cases of the novel virus have been confirmed as of January 23, 2020.

On January 24, the US Centers for Disease Control and Prevention confirmed a second case of 2019-nCoV in a female patient in Chicago. The patient visited Wuhan and returned to Chicago on January 13 but was not ill while traveling. Two cases of 2019-nCoV were also confirmed in France, according to reports by the Associated Press.

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