China is stepping up efforts to stop the spread of a the novel coronavirus 2019-nCoV:
Chinese President Xi Jinping has held a special government meeting on the Lunar New Year public holiday to warn that the spread of a deadly new virus is "accelerating".
The country is facing a "grave situation" Mr Xi told senior officials, according to state television.
The coronavirus has killed at least 41 people and infected almost 1,300 since its discovery in the city of Wuhan.
Travel restrictions have already hit several affected cities.
And from Sunday, private vehicles will be banned from the central districts of Wuhan, the source of the outbreak.
Across mainland China, travellers are having their temperatures checked for signs of fever, and train stations have been shut in several cities.
An infected person transmits the virus to X healthy persons. In an epidemic the factor X is greater than 1. For the novel coronavirus the initial factor, also known as R0 or R naught, is 1.4-2.5 which is not especially high.