A recent study tracked nearly 100 million Americans via mobile phones, and reopening restaurants on this basis poses the greatest risk of spreading COVID-19.
Researchers at Stanford University and Northwestern University use anonymityMap the movement of people from their residential areas to more than 500,000 different destinations (including restaurants and places of worship) in the 10 largest metropolitan areas in the United States from March 1 to May 2, and then superimpose these data into a model How to spread the virus to determine the mode of infection.
The lead author of the study, Yuri Leskovic, said: “If you consider restaurants, people will stay there for a long time, and many of them are small places where people gather.” “Compared with grocery stores and department stores. , The population density there is high, and grocery stores and department stores are bigger places, far less crowded than restaurants.
This study shows that in stadiums, coffee shops, hotels, and chapels, the chance of being infected is also higher, but the risk is four times lower than in restaurants.
With the increase in COVID-1
Researchers found that in Chicago, so-called points of interest (from full-service restaurants to car dealerships, dense outdoor venues) accounted for only 10% and accounted for more than 80% of COVID-19 infections. The survey results show that without restricting where people can circulate or implementing other containment measures, one-third of the U.S. population will be infected with COVID-19 within a month.
Leskovitz said: “This means that the virus spreads very quickly. Keeping a distance from society and staying at home is an effective measure to prevent the spread of the virus.”
This study shows that limiting occupancy rates is an effective reopening strategy.in caseFor example, if it is reopened at 20% capacity, the coronavirus infection will be reduced by more than 80% compared to full occupancy. At the same time, the overall visits to these dining venues decreased by only 42%.
This is because the relationship between predicted infections and the number of visits is non-linear. The author wrote: “By reducing the number of visits, infections can be greatly reduced.”
Leskovitz said: “We have proved that early opening is not all or nothing. Reducing the occupancy rate is a very effective way to reduce the number of infections.”
Research also shows that low-income people are more susceptible to infection.Part of the reason is because they may be, Or ship groceries, asking them to contact individuals who may be infected with COVID-19 more frequently.
Leskovic said: “In the richer communities, people can stay at home.” “But people in poor areas must go to work, otherwise they will not be able to afford food delivery.”