The coronavirus is being watched with a wary eye around the globe as it accelerates its spread in China with 80 deaths so far, while the US Consulate in the city at the epicentre announced it will evacuate its personnel and some private citizens aboard a charter flight.
The latest figures reported on Monday morning also had the number of confirmed cases at 2744.
China's health minister said the country was entering a "crucial stage" as "it seems like the ability of the virus to spread is getting stronger."
Ma Xiaowei declined to estimate how long it would take to bring the situation under control, but said travel restrictions and other strict measures should bring results "at the lowest cost and fastest speed."
President Xi Jinping has called the outbreak a grave situation and said the government was stepping up efforts to restrict travel and public gatherings while rushing medical staff and supplies to the city at the centre of the crisis, Wuhan, which remains on lockdown with no flights, trains or buses in or out.
The epidemic has revived memories of the SARS outbreak that originated in China and killed nearly 800 as it spread around the world in 2002 and 2003.
Its spread has come amid China's busiest travel period of the year, when millions crisscross the country or head abroad for the Lunar New Year holiday.
The government also reported five cases in Hong Kong and two in Macao. Small numbers of cases have been found in Thailand, Taiwan Japan, South Korea, the US, Vietnam, Singapore, Malaysia, Nepal, France and Australia.
The US has confirmed cases in Washington state, Chicago, Southern California and Arizona. Canada said it discovered its first case, a man in his 50s who was in Wuhan before flying to Toronto.
Taiwan, Singapore and South Korea each reported one new case Sunday, while Thailand reported three new cases.
A notice from the US Embassy in Beijing said there would be limited capacity to transport US citizens on a Tuesday flight from Wuhan that will proceed directly to San Francisco. It said that in the event there are not enough seats, priority will be given to to individuals "at greater risk from coronavirus."
The French Consulate also was considering an evacuation of its nationals from the city. It said it's working on arranging a bus service to help French citizens leave Wuhan.
Japan was also making preparations to fly its nationals out of Wuhan.Chinese travel agencies have been told to halt all group tours, and concern is growing over the potential impact of millions of people travelling back to the cities after the Lunar New Year holiday ends on Thursday.
China's National Health Commission said anyone travelling from Wuhan is now required to register with community health stations and quarantine themselves at home for 14 days – the virus' maximum incubation period.
Beijing has decided to delay the start of classes after the Lunar New Year holiday ends, the official Beijing Daily reported on its website. That will extend to all schools in the capital from kindergartens to universities.
Hong Kong announced similar measures on Saturday and on Sunday two of that territory's biggest attractions, Hong Kong Disneyland and Ocean Park, announced they were closing for the time being.