Based on data from the U.S. epidemic, the researchers sought to identify the sites and activities that contributed to the rapid spread of the coronavirus abroad.

Coronavirus: the second wave, the second closure

Later than expected by many, but in mid-November, the Hungarian government also decided to try to curb the second wave of the coronavirus epidemic by introducing restrictions. At the time of the decision, 5,000 new infections had been identified per day and the number of deaths from the virus mostly ranged from 50 to 100 in 24 hours. The first step is partial closure, but how effective it is is questionable. Follow our news!

Restaurants, cafes, gyms and other enclosed places were responsible for about 80 percent of coronavirus infections in the first months of the epidemic, according to US researchers.

A Nature Researchers from Stanford, Northwestern University, Microsoft Research, and Chan Zuckerberg Biohub in ten of the major cities in the United States: New York, Los Angeles, Chicago, Dallas, Washington, Houston, Atlanta, Miami, Philadelphia, and San Francisco. The movement was modeled on mobile phone data from March 1 to May 2. Approximately 98 million American movements have been traced from their homes to 553,000 locations. Based on the size of the area of ​​these sites, it was calculated how many people were present at the site per square meter at the same time.

The researchers also calculated how many infections may have occurred at the site and showed that only a small number of “super spread sites” were responsible for the majority of infections – read LiveScience scientific news portal. In Chicago, for example, 10 percent of those community sites were responsible for 85 percent of the infections. “Restaurants are by far the riskiest places, four times riskier than gyms and cafes, that hotels are still looking for new infections,” said Jure Leskovece, a researcher at Stanford University and lead author of the study, who presented his findings to journalists in a video conference. .

Researchers say these places are riskier because more people stay there for longer periods of time. The least risky places mentioned were car dealerships and gas stations.

By focusing on indoor community sites, the researchers were also able to model the impact of partial restrictive measures. For example, allowing restaurants to use only 20 percent of their capacity has been shown to reduce the number of infections in these restaurants by 80 percent, while they can retain around 60 percent of their guests.

[Rájöttek végre a kutatók, miért tudott ilyen gyorsan elterjedni a koronavírus]

The researchers noted that not all community locations, including schools and offices, are included in their model. In addition, their study used data from the start of the epidemic, which may not be applicable to the spread of the infection today. For example, today, people are more aware of social distance or wear masks in restaurants. Public health experts have noted that many of the new epidemics in the United States today are the result of smaller gatherings in people’s homes. However, the professionals hope that their findings can help the competent authority to impose restrictions in the second wave and provide guidance on reopening.

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