According to Indian researchers, a commercial five-layer mask that combines social distance with good ventilation is SARS-CoV, the virus that causes Covid-19 in closed spaces such as offices, prisons, and hospitals. It can be the key to controlling the spread of -2. Bhubaneswar Institute of Technology, Orissa.
A study published in the journal AIP Advances showed that air droplets leaked from the mask simply by breathing or participating in normal conversation, without the risk of coughing or sneezing.
Commercially available 5-layer masks provided complete protection of the front of the face and minimized leaks under the chin, while N-95 masks showed leaks in the gap between the mask and nose. The surgical mask also showed a leak from the front.
Researchers said the addition of a face shield could limit the spread of droplets.
This is a notable challenge in preventing the spread of the virus, they added, witnessing a second wave of 12.8 million positive cases currently occurring in India.
“Our findings indicate the need for a good ventilation system that takes into account 5-10% of aerosolized particle leaks that occur in each respiratory cycle as a way to reduce droplet concentration in confined spaces. “More,” said Venogopal Arumuru of Varsity.
“We also need to innovate in the mask design to reduce the leakage of droplets on the sides and bottom while providing ample facial comfort,” Arumuru added.
In the experimental setup, a mechanical breathing simulator was connected to a 5’8 inch high mannequin for normal breathing and moderate breathing, resting, walking, talking, participating in assembly, etc. We simulated a slightly longer breathing typical of healthy adults involved in the activity. work.
Researchers evaluated the effectiveness of different mask types, mask-shield combinations, and the use of face shields alone.
The fog generator was filled with a mixture of water and glycerin and emulated the consistency of saliva droplets in the range of 1-10 micrometers in diameter to reflect airborne permeability. The droplet exposure was illuminated and captured by a video camera.
Researchers have found that if the face is not covered, droplets from the breath can travel up to 4 feet in 5 seconds.
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Better mask, need proper ventilation to control COVID-19 indoors
Source link Better mask, need proper ventilation to control COVID-19 indoors