Researchers have suggested that China's decision to close the city of Wuhan, where the outbreak of the new Corona virus epidemic Covid-19 began last December, prevented more than 700,000 people from being infected, as it slowed the spread of the virus.

A report prepared by researchers in China, the United States and Britain, and published in a scientific journal, said that decisive measures taken by China in the first 50 days of the epidemic have given other cities in the country valuable time to prepare and impose their own measures.

British researcher Christopher Day said that by the 50th day of the epidemic, on February 19, the number of confirmed infections in China had reached 30,000.

He added: "Our analyzes indicate that if the travel ban was not imposed on Wuhan and the emergency national response was launched, there would be more than 700,000 confirmed injuries outside Wuhan by that date."

The researcher was quoted as saying in a press statement that the Chinese measures to control the spread of the epidemic were apparently successful because they succeeded in breaking the chain of transmission by preventing contact between infected people and those at risk.

In their investigations, the researchers used reports of injuries and public health information, in addition to geographic location monitoring via mobile phones.

Professor of biology at the University of Pennsylvania Uttar in Gornstad, who participated in the study, said that the monitoring by phone provided a serious and wonderful flow of data.

Begornstad stated that the researchers were able to compare travel patterns to and from Wuhan during the spread of the epidemic by relying on mobile phone data for two previous spring festivals.

He pointed out that "the analyzes revealed an exceptional decrease in traffic following the travel ban on January 23, 2020. Based on these data, we can also compute the weighted decrease of cases related to Wuhan in other cities across China."

The comparison showed that the closure of Wuhan had delayed the arrival of the virus to other cities, giving it time to prepare for a ban on public gatherings, the closure of entertainment venues and other measures.