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.