An outbreak of previously unknown pneumonia, later identified as a new strain of coronavirus, originated in the Chinese city of Wuhan in late December and has since then spread to several countries.
The Chinese National Health Commission has confirmed a total of 830 coronavirus cases and 25 deaths from the new virus, CCTV News reported on Friday.
More than 8,000 people are now under medical observation.
The Chinese authorities earlier reported over 600 cases and at least 17 deaths resulting from the new respiratory infection, which was first registered in the Chinese city of Wuhan and labelled as 2019-nCoV or Novel Coronavirus by the World Health Organisation (WHO).
Those infected showed symptoms of pneumonia and other acute respiratory diseases.