Health
A new study shows that masks and social distance are needed to stop the spread of the coronavirus.
Cleveland, Ohio — Wearing a mask is not very effective without social distance.
This is the discovery of a new study that tested five mask materials, showing how well it stopped the droplets carrying the coronavirus that spread through breathing, coughing, sneezing, and conversation.
All mask materials have dramatically reduced the number of droplets that spread. However, at distances less than 6 feet, sufficient droplets that could cause COVID-19 were detected to pass through several materials, the paper said.
Droplets fall from the air as they move away from the source.
Papers that appeared this week It is in the Physics of Fluids, a journal covering the science of gases, liquids, and complex fluids.
Krishna Kota, an associate professor at New Mexico State University and one of the authors of the article, said: “It’s not just the mask that helps. It’s both the mask and the distance.”
Kota was quoted in Press release from the American Institute of Physics.
According to the release, a single sneeze from a person with COVID-19 can spread up to 200 million small virus particles.
In this study, researchers at New Mexico State University used an air generator to blow small liquid particles that resemble sneezing or coughing droplets through a laser sheet in an airtight square tube equipped with a camera. ..
Researchers used five mask materials: regular cloth masks, two-layer cloth masks, moist two-layer cloth masks, surgical masks, and medical-grade N-95 masks for droplets in tubes. The flow was cut off. ..
Each mask captured most of the droplets. A normal cloth mask was able to escape less than 4% of the droplets, while the N-95 mask stopped almost 100% of the droplets.
However, at distances less than 6 feet, even a small percentage of the escaped droplets may be sufficient to spread COVID-19, especially if the sick person repeatedly sneezes or coughs. Researchers said there was.
This study does not consider leaks from the mask or whether the mask is properly or improperly worn. Leaks and improperly worn masks can increase the number of droplets in the air.
“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,” the study authors write. I am. “If possible, we should consider minimizing or avoiding close face-to-face or frontal human interactions. If the relevant social distance guidelines are compromised, the study will It shows that foreign body aerial sneezing and cough droplets can pass through all tested masks (except N-95 masks), even assuming a 100% snug fit.
Put on a mask, Avoid crowds Frequent hand washing According to the Centers for Disease Control and Prevention, it is the best way to delay the spread of COVID-19. Mask is not a substitute According to the CDC guidance, for social distance.
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