Most of this was down to Hubei using a broader definition to diagnose people, said Mike Ryan, head of WHO’s health emergencies programme.
There was also no significant rise in cases outside China, the WHO said.
However, a cruise ship docked in Japan, the Diamond Princess, saw 44 new cases, bringing the total there to 218.
What is the situation with medical workers?
Zeng Yixin, vice minister of China’s National Health Commission, said 1,102 medical workers had been infected in Wuhan, where the outbreak began, and another 400 in other parts of Hubei province.
He said the number of infections among staff was increasing.
“The duties of medical workers at the front are indeed extremely heavy; their working and resting circumstances are limited, the psychological pressures are great, and the risk of infection is high,” Mr Zeng said, quoted by Reuters.
Local authorities have struggled to provide protective equipment such as respiratory masks, goggles and protective suits in hospitals in the area.
One doctor told AFP news agency that he and 16 colleagues were showing possible symptoms of the virus.
Global airline revenue expected to fall by $4bn (£3.1bn) to $5bn this year
China’s car sales likely to fall more than 10% in first half of year, the China Association of Automobile Manufacturers tells Reuters
Singapore’s economy could fall into recession as a result of the outbreak, Prime Minister Lee Hsien Loong says
Malaysian finance minister says a stimulus package will be announced for aviation, retail and tourism industries
What is happening on the Diamond Princess?
The vessel is in quarantine in Yokohama, in southern Japan. Not all the 3,700 people on board have been tested yet.
People with the virus are taken to hospitals on land to be treated, while those on board are largely confined to their cabins.
However on Thursday Japan said it would allow those aged 80 or over who have tested negative for the coronavirus to disembark.
Health Minister Katsunobu Kato said they could be allowed off the ship as early as Friday but would have to stay in accommodation provided by the government, the Japan Times reported.
Meanwhile another cruise ship – the MS Westerdam, carrying more than 2,000 people – docked in Cambodia after being turned away by ports in Japan, Taiwan, Guam, the Philippines and Thailand despite having no sick patients on board.
In other developments:
Outside China there have now been two deaths and 456 cases in 24 countries
Singapore health ministry reports nine new cases, bringing the total number there to 67
Australia has extended its ban on people coming from mainland China for another week, to 22 February
China said it would stagger the return of children to school – several provinces have closed schools until the end of February
In Vietnam, which borders China, thousands of people in villages near the capital, Hanoi, have been put under quarantine after several cases were discovered. Vietnam has now confirmed at least 16 cases
The Red Cross has called for sanctions relief for North Korea, which would allow the aid agency to transfer funds to buy equipment. Testing kits and protective clothing are urgently needed to prepare for a possible outbreak, it says