Hong Kong, which has eight confirmed cases, on Monday barred entry to residents of Hubei Province or anyone who had visited Hubei in the past 14 days. She said there is no sign yet of it spreading to Hong Kong's general population.
According to Feng Luzhao, researcher with the China Centre for Disease Control and Prevention, the most effective way to stop the transmission would be to reduce travel and avoid meetings.
Sunday saw 769 new confirmed cases, 3,806 new suspected cases and 24 deaths (all in Hubei province), the Commission revealed.
State-run China Global Television Network (CGTN) cited reports from NHC which stated that the death toll from nCoV has climbed to 80 and the number of confirmed cases to a total of 2,744 persons across the country.
The United States, France and Japan were among the countries looking to evacuate their citizens from Wuhan on Monday.
In Wuhan, "non-essential" vehicle traffic has been banned since midnight in the center of the metropolis, which has become strangely silent, as an AFP team observed.
Xinhua said medical supplies are being rushed to the city, including 14,000 protective suits, 110,000 pairs of gloves and masks and goggles.
Wuhan's major Zhou Xianwang had said on Sunday that around five million people had left the stricken city during the new year travel rush in January, highlighting fears the virus could spread further.
China has expanded its efforts to curb viral disease on Monday by extending New Year's holidays to keep the public at home and prevent the spread of infections as the death toll has increased to 81.
But some experts have warned those measures came too late, with millions leaving the region for the annual Lunar New Year holiday before the lockdown.
Investors are anxious about the impact on travel, tourism and broader economic activity.
The new virus is part of the coronavirus family that includes the common cold but also more severe illnesses like SARS and Middle East Respiratory Syndrome. Prominent Chinese human rights lawyer Zhang Xuezhong denounced them as "savage" online, earning him the opprobrium of many panicked commentators.
As the world watches the developing crisis around the deadly Wuhan coronavirus, it's hard to know how anxious to be.
Many Chinese netizens were incensed by what they perceived as a series of errors at a televised press conference Sunday by three local officials at the heart of the new virus outbreak.
The World Health Organization (WHO) estimated an incubation period of two to 10 days.
As Xi and the rest of the Standing Committee meet this week to discuss how to tackle the virus's continued spread, they may decide on more draconian tactics. The U.S., Thailand, Taiwan, Japan, Vietnam, Singapore, Malaysia, Nepal, France, Canada, and Australia have also confirmed cases of coronavirus.
A US-bound flight is scheduled to leave Wuhan today with consular staff and some American citizens.
Images on social media showed hospital corridors packed with people seeking treatment.
Asian countries introduce mandatory screenings at airports of arrivals from high-risk areas of China.
Travel, hotels, and restaurants will have the greatest impact, but forecasts predict that if the outbreak continues and quarantine continues, Chinese retail spending, manufacturing output, and investment could also suffer.