The researchers found that the coronavirus could spread twice as quickly as previously feared.
The virus was first detected in Wuhan, China in December 2019 before spreading worldwide, killing 109,000 people and infecting more than 1.7 million people to date.
Figures released at the start of the outbreak claimed that one person would infect 2.2 to 2.7 people.
However, scientists at the Los Alamos National Laboratory in New Mexico who studied the early stages of the Wuhan epidemic found that each carrier infected an average of 5.7 people.
Researchers have found that the coronavirus can spread twice as fast as previously feared. In the photo: people wear protective masks in Wuhan
Scientists at Los Alamos National Laboratory in New Mexico have tracked the spread of the virus using travel models to China based on positioning services by mobile phone.
The study found that 82% of people should be immunized – either through a vaccine or by already recovering from the disease – to prevent its spread.
The rate of “doubling” of the virus – passing from one person to another leaving two people infected – was initially administered between six and seven days.
But the American research team established this figure between 2.3 and 3.3 days at the start of the Wuhan epidemic “suggesting a much faster spread rate than initially measured,” according to the results of the study. .
When the epidemic started, researchers thought the virus was spreading between 0.1 and 0.14, half the figures of 0.21 and 0.30 currently established.
Scientists have found that the incubation period – the period from which a person is first exposed to the insect when it begins to show symptoms – is 4.2 days (top left ), one day less than two previous estimates. The time between the onset of the first symptoms and hospitalization (top right) is 1.5 days
The bug was first detected in Wuhan, China in December 2019 before spreading worldwide, killing 109,000 people and infecting more than 1.7 million people. In the photo: a woman walks her dog while wearing a face mask in Wuhan
Scientists have found that the incubation period – the period between when a person is first exposed to the bug and when they start to show symptoms – is 4.2 days, one day less than two previous estimates.
Before January 18, the period between the onset of symptoms and hospitalization was 5.5 days in China.
After January 18, the duration shortened considerably to 1.5 days.
The scientists said this was happening in conjunction with reports of potential human-to-human transmission and an improvement in the country’s emergency response level.
China cordoned off Wuhan on January 23, when it became apparent that the deadly Covid-19 virus had started there.
But at 12:50 a.m. on Wednesday, trains carrying people out of town began to run, and major highways also began to open as China’s lock on Wuhan was lifted.