Health
Masks alone cannot prevent the spread of Covid-19 and follow physical distances
Wearing a face mask alone does not prevent you from catching a new coronavirus. COVID-19 (new coronavirus infection) (# If there is no character limit, add parentheses when it first appears, Studies show that if you do not maintain a physical distance.
In this study, published in the journal Physics of Fluids, we tested how five mask materials affect the spread of droplets carrying the SARS-CoV-2 virus when coughing or sneezing.
All materials tested by researchers have dramatically reduced the number of droplets transmitted.
The mask is important, but the physical distance can stop the spread
However, they said that even when the physical distance was less than 6 feet, enough droplets that could cause viral disease passed through some material.
Krishna Kota, an associate professor at New Mexico State University in the United States, said:
“It’s not just a mask that helps. It’s both a mask and a distance,” Kota added.
Researchers have developed a machine that uses an air generator to mimic human coughing and sneezing.
Why is physical distance so important?
The generator was used to blow small liquid particles, such as sneezing and coughing air droplets, through a laser sheet in an airtight square tube with a camera.
They used regular cloth, a two-layer cloth mask, a damp two-layer cloth, and five types of surgical materials to block the flow of droplets in the tube. mask, And medical grade N-95 ventilator.
Each mask captured most of the droplets, from regular cloth masks that let about 3.6% of the droplets pass through to N-95 masks that statistically stop 100% of the droplets.
How the virus moves in the air
Researchers point out that even a small percentage of droplets can get sick at distances less than 6 feet, especially if a person with COVID-19 sneezes or coughs multiple times. did.
Researchers say a single sneeze can carry up to 200 million small sneezes Virus Particles, depending on the degree of carrier illness.
Don’t forget the mask!
They said that even if the mask blocked most of those particles, if the person was near the carrier, it would be enough to escape someone from getting sick.
“Without a face mask, it’s almost certain that many foreign objects will move to susceptible people,” Kota said.
“Wearing a mask provides substantial but incomplete protection to sensitive individuals by reducing the number of outpatient sneezes and cough droplets that enter a person without a mask,” he said. ..
Kota added that people should strive to minimize or avoid close human interactions, either face-to-face or head-on.
(There is input from the institution)
Release date: December 23, 2020 14:04
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