Face Masks Alone May Not Stop Coronavirus Spread Without Phy
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The research, published in the journal Physics of Fluids, tested how five different types of mask materials affected the spread of droplets that carry the SARS-CoV-2 virus, when we cough or sneeze. All the material the researchers tested dramatically reduced the number of droplets that were transmitted.

However, enough droplets to potentially cause the viral illness still made it through several of the materials when physical distance was less than six feet, they said. A mask definitely helps, but if the people are very close to each other, there is still a chance of spreading or contracting the virus, said Krishna Kota, an associate professor at New Mexico State University in the US.

The researchers developed a machine that uses an air generator to mimic human coughs and sneezes. The generator was used to blow tiny liquid particles, like the airborne droplets of sneezes and coughs, through laser sheets in an airtight square tube with a camera.

They blocked the flow of the droplets in the tube with five different types of materials a regular cloth, a two-layer cloth mask, a wet two-layer cloth, a surgical mask, and a medical-grade N-95 ventilator.

Each of the masks captured the vast majority of droplets, ranging from the regular cloth mask, which allowed about 3.6 percent of the droplets, to the N-95 mask, which statistically stopped 100 per cent of the droplets. They noted that at distances of less than six feet, even those small percentages of droplets can be enough to get someone sick.

According to the researchers, a single sneeze can carry up to 200 million tiny virus particles, depending on how sick the carrier is. They noted that even if a mask blocks a huge percentage of those particles, enough could escape to get someone sick if that person is close to the carrier.

Source:
https://aip.scitation.org/doi/10.1063/5.0035072
Dr. S●●●●●●●●●●n K●●●●●●i and 17 others like this7 shares
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Dr. A●●Y K●●●R G●●G
Dr. A●●Y K●●●R G●●G Radiology
Howmuch viral load will enter in body?
Dec 23, 2020Like
Dr. J●●●●●h A●●●●i
Dr. J●●●●●h A●●●●i General Medicine
I suppose this is because the lack of improper mask wearing. The way people use it - improperly covering the areas that needed to be covered.
Dec 24, 2020Like
Dr. j●●●●●●●●a p●●●●i
Dr. j●●●●●●●●a p●●●●i Anaesthesiology
Yes,for the most part they are wearing it under their nose or chin!!!!
Dec 30, 2020Like