New Covid wave has begun and masks should be worn again, scientists warn
New Covid wave has begun and masks should be worn again, scientists warn
Spread of new variant could cause extreme pressure on NHS and cause more damaging long-term health problems, Sage expert says
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They work better than your brain does.
LOL
They do.
From: Verma, S., Dhanak, M., & Frankenfield, J. (2020). Visualizing the effectiveness of face masks in obstructing respiratory jets. Physics of Fluids, 32(6), 061708. https://doi.org/10.1063/5.0016018
TABLE I. A summary of the different types of masks tested, the materials they are made of, and their effectiveness in impeding droplet-dispersal. The last column indicates the distance traveled by the jet beyond which its forward progression stops. The average distances have been computed over multiple runs, and the symbol “∼” is used to indicate the presence of high variability in the first two scenarios listed.
Mask type Material Threads/in. Average jet distance
Uncovered … … ∼8 ft
Bandana Elastic T-shirt material 85 ∼3 ft 7 in.
Folded handkerchief Cotton 55 1 ft 3 in.
Stitched mask Quilting cotton 70 2.5 in.
Commercial maska Unknown Randomly assorted fibres 8 in.