A second person died in the northwestern US state of Washington as President Donald Trump, who has downplayed the risk of a major outbreak, faced criticism over his administration's preparedness.

South Korea, the biggest nest of infections outside China, reported nearly 500 new cases on Monday, raising its total past 4,000.

Half of South Korea's cases are linked to a sect whose leader apologised Monday for the spread of the disease. Seoul's city government asked prosecutors to press murder charges against him.

With fears of a pandemic on the rise, the World Health Organization urged all countries to stock up on critical care ventilators to treat patients with severe symptoms of the deadly respiratory disease.

The rapid spread of the coronavirus has raised fears over its impact on the world economy, causing global markets to log their worst losses since the 2008 financial crisis, though Asian markets rebounded on Monday.

China's economy has ground to a halt with large swathes of the country under quarantine or measures to restrict travel.

China reported 42 more deaths on Monday -- all in central Hubei province. The virus is believed to have originated in a market that sold wild animals in Hubei's capital, Wuhan.

The death toll in China alone rose to 2,912, but it is also rising abroad, with the second-highest tally in Iran, at 54. The United States and Australia had their first fatalities from the disease over the weekend.

But infections are now rising faster abroad than in China, as the country's drastic measures, including quarantining some 56 million people in Hubei since late January, appear to be paying off.

- Infections double in Italy-

After an increase on Sunday, China's National Health Commission reported 202 new infections on Monday, the lowest daily rise since late January. There have been more than 80,000 infections in the world's most populous country.

By contrast, infections nearly doubled over the weekend in Italy, Europe's hardest-hit country with nearly 1,700 cases.

Four more people died in South Korea, taking its toll to 22.

Seoul's city government has asked prosecutors to press charges, including murder, against him and 11 other sect leaders for failing to cooperate in containing the spread of the virus.

Lee insisted that the group was "actively cooperating with the government".

A 61-year-old female member developed a fever on February 10 but attended at least four church services in Daegu before being diagnosed.

- US criticism -

In the United States, a man in his 70s with underlying conditions died on Saturday, health officials said, as New York reported its first case in a woman who had visited Iran.

It is the second death in both Washington state and King County.

The first victim was one of a handful with no known links to global hot zones to have contracted the virus -- indicating that the pathogen was now likely spreading in communities.

Vice President Mike Pence and Health Secretary Alex Azar defended the administration's handling of the virus, while seeking to reassure Americans and promising to make up for shortfalls in virus testing kits.

"We could have more sad news, but the American people should know the risk to the average American remains low," Pence told CNN.

"We will see more cases," Azar said.

"But it's important to remember, for the vast majority of individuals who contract the novel coronavirus, they will experience mild to moderate symptoms."