Over 1,500 people have died from the virus, which originated in Wuhan city.
China’s national health commission on Saturday reported 143 new deaths, bringing the toll to 1,523. All but four of the latest victims were in hard-hit Hubei province.
A further 2,641 people have been newly confirmed as infected, bringing the national total to 66,492.
Outside mainland China, there have been more than 500 cases in 24 countries, and three deaths: one each in Hong Kong, the Philippines and Japan.
A World Health Organization (WHO)-led mission to China will start its outbreak investigation work this weekend, focusing on how the virus – officially named Covid-19 – is spreading and its severity, director Tedros Adhanom Ghebreyesus said.
The mission, including international experts, will also look at how and when more than 1,700 health workers contracted the virus.
The team consists of 12 international members and their 12 Chinese counterparts. “Particular attention will be paid to understanding transmission of the virus, the severity of disease and the impact of ongoing response measures,” said Dr Mike Ryan, executive director of the WHO health emergencies programme.