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"Outside, it's better than from the inside," Dr. Anthony Fauci, the first coronavirus expert in the nation repeated several times in the pandemic. If you are curious, so this is the case, a new study from the University of Minnesota Scientists hopes you explain it.

TheReport not yet examined by peersPosted online on July 28 on the ARXIV website, explains how the virus travel via liberated respiratory droplets when individual cough, sneezed, speaks, sings or shouts and heads to the room. The researchers hope that their information will be beneficial in the reopening of companies, such as film theaters and concert halls, as well as schools.

The coupling of the virus a turn '

Mechanical Engineering The Jiarong Hong Associate Professor and Assistant Professor Suo Yang have modeled the transmission of airborne viruses through aerosols, released from our mouths when we expire or talk. They found that when an infected person publishes tiny infected droplets, the Virus Cov-2 Sars "Hitches a Tour" on aerosols, which then land on neighboring areas or are inhaled by other people.

"In general, it is the first quantitative assessment of the risk of the spatial variation of risks in interior environments," Hong said in a press release. "You see many people talk about what the risks are to stay in confined spaces, but no one gives a quantitative number. I think the major contribution we have made is to combine very specific measures and a dynamic simulation computer fluid to provide a very quantitative quantity. Risk estimation. "

Hong and Yang used accurate experimental measures of aerosols released by eight asymptomatic people with COVID-19. They then numerically modeled the outer flow of the virus through the air in three different interior spaces: an elevator, a classroom and a supermarket.

They also compared the way in which the virus was touched by different levels of ventilation and spacing of the occupants of the room. In the interior spaces, they discovered that good ventilation filters part of the air virus, but can leave more viral particles on surfaces. For example, in the classroom, which involved an asymptomatic teacher speaking 50 minutes, only 10% of aerosols were filtered with the majority of particles deposited on the walls.

Vortex form

"Because it's a very strong ventilation, we thought it would ventilate a lot of aerosols. But 10% is really a small number," Yang explained. "The ventilation forms several circulation zones called vortices and the aerosols continue to turn in this vortex. When they collide with the wall, they attach to the wall. But, because they are essentially trapped in this vortex, and c is very difficult for them to reach the vent and actually get out. "

In each scenario, the researchers also mapped the airflow to identify "hot" on-site locations of the virus. They noted that if a room was well ventilated with individuals organized effectively, the spread of diseases could be mitigated. For example, in a frame such as a classroom, if the teacher has been placed directly under a vent of air, virus aerosols propagate considerably less in the room.

"After our work goes out, I think more people will ask for help because I think many reopening companies will need this need - theaters of cinema, theaters, any place with great gatherings," said Yang. "If you do a good job, if you have good ventilation in the right place, and if you disperse the public square correctly, it could be much safer."

As for yourself: wear your face mask, do you test if you think they have coronaviruses, avoid crowds (and bars and evenings of the house), practice social distance, only manage essential races, Wash your hands regularly, disinfect frequently affected areas and cross this pandemic at your healthier, do not miss these37 places you are most likely to catch coronavirus.