In this Thursday, Jan. 30, 2020, photo, a group of Chinese tourists some of them with face mask pose for a photo under the world's tallest tower, Burj Khalifa, in Dubai, United Arab Emirates. The World Health Organization declared the outbreak sparked by a new virus in China that has been exported to more than a dozen countries as a global emergency Thursday after the number of cases spiked tenfold in a week. (AP Photo/Kamran Jebreili)
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