The new study reports on 44,672 cases confirmed in China as of February 11.
It said the death rate from the disease for males was 2.8 per cent and that for females was about 1.7 per cent.
Hundreds of cases have been confirmed outside China, with a significant number on a cruise ship quarantined at a port near Tokyo.
Apple became the latest company to warn of trouble, saying it would not meet its guidance for March-quarter revenue because of slower iPhone production and weaker demand in China.
The WHO stressed that the mortality rate remains relatively low: "This is a very serious outbreak and it has the potential to grow, but we need to balance that in terms of the number of people infected".
The US evacuated 338 American passengers, with majority placed in a 14-day quarantine at military bases in California and Texas. Ten others, along with three spouses, were flown to Omaha, Nebraska, to get care at the University of Nebraska Medical Center, officials said.
Four of the Americans who tested positive for the virus were taken to California hospitals.
Children of China's front-line medical workers battling the deadly coronavirus will be awarded extra exam points when applying for schools and higher education, local officials said Tuesday (Feb 18).
Shortly after the publication of the document, the World Health Organization director-general invited the public to calm, despite the positive news contained in it. "The next step was to move them to an isolation area and frankly once they were in an isolation area it was safest to keep them in that isolation area and complete the evacuation".
Given human-to-human transmission of the disease, over 1.41 lakh people who have come in contact with the people who contracted the virus are still under medical observation, it said.
In Asia, with fears of the virus spreading further, Chinese and residents of nearby countries and territories have begun hoarding supplies of everything from masks and other personal protective gear to instant noodles, cooking oil and toilet paper. The new strain of the virus with pneumonia-like symptoms has till now claimed more than 1800 lives in China and other countries. Outside China, there have been 827 cases in 26 countries and regions and five deaths, according to a Reuters count based on official statements.
By Monday, 60 confirmed cases including one death had been reported in Hong Kong 10 confirmed cases in Macao and 22 in Taiwan including one death.
Japanese Prime Minister Shinzo Abe convened an experts meeting to discuss containment measures in his country, where more than a dozen cases have emerged in the past few days without any obvious link to China.
South Korean President Moon Jae-in said the economy was in an emergency situation and required stimulus as the epidemic had disrupted demand for South Korean goods.
China's biannual auto show, one of the industry's biggest worldwide events, has been postponed, and many sports and entertainment events have been delayed or canceled to avoid travel that may spread the virus. Out of these, 1,716 cases were confirmed.