Health officials in China have published the first details of more than 44,000 cases of Covid-19, in the biggest study since the outbreak began.
It finds that 80.9% of infections are classified as mild, 13.8% as severe and only 4.7% as critical. The number of deaths among those infected, known as the fatality rate, remains low but rises among those over 80 years old.
The report by the CCDC shows the province’s death rate is 2.9% compared with 0.4% in the rest of the country.
The findings put the overall death rate of the Covid-19 virus at 2.3%.
Looking at the sex ratio, men are more likely to die (2.8%) than women (1.7%).
The study also identifies which existing illnesses put patients at risk. It puts cardiovascular disease at number one, followed by diabetes, chronic respiratory disease and hypertension.
The research also points to the high risk to medical staff.
The paper says that a total of 3,019 health workers have been infected, 1,716 of which were confirmed cases. Five had died by 11 February, which was the last day of data included in the research.
China’s latest official figures released on Tuesday put the overall death toll at 1,868 and 72,436 infections.
Officials reported 98 new deaths and 1,886 new cases in the past day, with 93 of those deaths and 1,807 infections in Hubei province – the epicentre of the outbreak.
More than 12,000 people have recovered, according to Chinese authorities.
A hospital director in the city of Wuhan died from the virus on Tuesday.
Liu Zhiming, 51, was the director of the Wuchang Hospital in Wuhan – one of the leading hospitals in the virus epicentre. He is one of the most senior health officials to die so far.
Hubei, whose capital is Wuhan, is the worst affected province in the country.