The World Health Organization on Thursday declared the outbreak of a novel coronavirus a global health emergency, an acknowledgement of the risk the virus poses to countries beyond its origin in China and of the need for a more coordinated international response to the outbreak.

In making the announcement, WHO leaders urged countries not to restrict travel or trade to China, even as some have shut down borders and limited visas.

(CC BY-ND 2.0), flickr, Eric Bridiers

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