The order to shutdown Wuhan came the day before Chinese New Year.
Like SARS, it can be passed among people through the respiratory tract.
Overseas, one case has been confirmed in the regions of Hong Kong, Macao, Taiwan, as well as in the United States, Japan and the Republic of Korea respectively, and three in Thailand.
Novel coronavirus, which is linked to an outbreak of pneumonia, has global public health officials concerned about its potential to spread around the world.
The emergency committee will meet again from 1100 GMT on Thursday, after its chair, Didier Houssin, said the experts were split over declaring a public health emergency.
Though Tedros praised China's "very, very strong measures" to contain the outbreak. "We stressed to them that by having a strong action, not only they will control the outbreak in their country, but they will also minimize the chances of this outbreak spreading internationally".
This afternoon NSW Chief Health Officer Dr Kerry Chant said they are now investigating whether one patient had the virus but said there were no confirmed cases at this stage.
The city's tourism and culture department cancelled all group tours until February 8, according to the official Xinhua news agency.
Authorities halted flights and trains from Thursday at 10am out of Wuhan and told residents they should not leave without a special reason.
Cast your vote to name NASA's next Mars rover
Members of the public have an opportunity to vote for their favorite name for NASA's next Mars rover . The Mars 2020 official name will be announced after the contest concludes in early March.
GM about to unveil its first driverless vehicle
As such, Cruise's new vehicle will likely be used for a driverless ride-sharing service. If enough people use it, congestion will be reduced on the roads and in parking lots.
YouTube TV comes to PS4 as PS Vue moves out
It now costs $49.99/mo, features 70+ channels, free DVR, local sports and news, and no extra fees beyond that $49.99 price. This makes Google the first third-party company to get a tv subscription service on the PS4.
A second person, a 69-year-old man, dies in Wuhan, according to the authorities.
Many countries are screening travellers from China for illness, especially those arriving from Wuhan.
Little is known about the new coronavirus strain, although human-to-human transmission has been confirmed.
The Chinese government has classified the outbreak in the same category as the SARS epidemic, meaning compulsory isolation for those diagnosed with the illness as well as the ability to implement quarantine measures.
But they still have not been able to confirm the exact source of the virus.
Bats being the native host of the 2019-nCoV "would be the logical and convenient reasoning, though it remains likely intermediate host (s) were in the transmission cascade from bats to humans", said researchers. Experts suspect the virus was first transmitted from wild animals but the virus also may be mutating. Li Bin of China's National Health Commission on Wednesday said 1,394 people were still under medical observation.
Thermal scanning of passengers underway at Hankou Railway Station in Wuhan. "They also need to provide sufficient resources at Canadian ports of entry for screening, particularly at airports", he said.
The Washington state patient had recently returned from Wuhan.
The WHO said it believed an animal source was the "primary source" of the outbreak, and Wuhan authorities identified a seafood market as the centre of the epidemic.
A senior U.S. State Department official also called on China to "play a bigger role in global health so they taking more and significant measures to limit or minimize the worldwide spread".
During the SARS epidemic, the Chinese government took months to report the disease and initially denied World Health Organization experts access to southern Guangdong province, where it originated.