Scientists noted that by the fiftieth day of the epidemic, the number of confirmed cases was about 30 thousand.
Researchers used a combination of reports oninfections, movement data and information on interventions by the authorities. Scientists studied the movement of 4.3 million people from Wuhan before the ban on travel, the types and timing of control measures in Chinese cities, as well as the number of cases of COVID-19 recorded in each city.

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The team model also analyzed otherthe consequences of restricting movement in Wuhan and found that it delayed the spread of the virus to other cities for several days. “This delay provided extra time to prepare for COVID-19 in more than 130 cities,” the scientists said.
In other cities, massivemeetings, entertainment facilities closed, and public transport stopped. There, during the first week of the spread of the virus, 33% fewer confirmed cases were recorded than in cities where these measures were not taken.
Earlier, the Chinese authorities announced the end of the epidemicCOVID-19 in the country. The spread of coronavirus infection within China has generally been stopped. They noted that the number of people infected with coronavirus within the country does not exceed 3 thousand people.