BEIJING, CHINA - JANUARY 26: A Chinese girl wears a protective mask as she stands on an overlook towards the Forbidden City, which was closed by authorities, during the Chinese New Year holiday on January 26, 2020 in Beijing, China. The number of cases of a deadly new coronavirus rose to over 2000 in mainland China Sunday as health officials locked down the city of Wuhan earlier in the week in an effort to contain the spread of the pneumonia-like disease. Medical experts have confirmed the virus can be passed from human to human. In an unprecedented move, Chinese authorities put travel restrictions on the city which is the epicenter of the virus, and neighboring municipalities affecting tens of millions of people. The number of those who have died from the virus in China climbed to at least 56 on Sunday, and cases have been reported in other countries including the United States, Canada, Australia, France, Thailand, Japan, Taiwan and South Korea. (Photo by Kevin Frayer/Getty Images)
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BEIJING, CHINA - JANUARY 26: A Chinese girl wears a protective mask as she stands on an overlook towards the Forbidden City, which was closed by authorities, during the Chinese New Year holiday on January 26, 2020 in Beijing, China. The number of cases of a deadly new coronavirus rose to over 2000 in mainland China Sunday as health officials locked down the city of Wuhan earlier in the week in an effort to contain the spread of the pneumonia-like disease. Medical experts have confirmed the virus can be passed from human to human. In an unprecedented move, Chinese authorities put travel restrictions on the city which is the epicenter of the virus, and neighboring municipalities affecting tens of millions of people. The number of those who have died from the virus in China climbed to at least 56 on Sunday, and cases have been reported in other countries including the United States, Canada, Australia, France, Thailand, Japan, Taiwan and South Korea. (Photo by Kevin Frayer/Getty Images)
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Hong Kong CNN  — 

Hong Kong announced Tuesday that it was closing many of its border crossings with mainland China in a bid to contain the Wuhan coronavirus, as the death toll from the outbreak topped 100, with more than 4,600 cases in the mainland.

The virus has also spread globally to more than 17 countries. On Tuesday, experts from the German Robert-Koch-Institute said they believed that a man who tested positive for coronavirus in Germany is the first case of human-to-human infection in Europe.