Chinese authorities have advised people to stop travel into and out of Wuhan, the city at the centre of a new virus outbreak that has killed nine.
Those living in the city of 8.9 million people have also been told to avoid crowds and minimise public gatherings.The new virus has spread from Wuhan to several Chinese provinces, as well as the US, Thailand and South Korea.
There are 440 confirmed cases, with the origin a seafood market that "conducted illegal transactions of wild animals".
The virus, known also as 2019-nCoV, is understood to be a new strain of coronavirus that has not previously been identified in humans.
Signs of infection include respiratory symptoms, fever, cough, shortness of breath and breathing difficulties.