Created: August 10, 2020 10:28 PM
(WHEC) — Another study took a look at which face masks are most effective in reducing the spread of coronavirus.
Researchers from Duke University studied the spread of respiratory droplets using a box, a laser beam, a lens and a cell phone camera.
They had participants speak into the box first without a mask, then again with 14 different masks.
Each was tested 10 times, and a computer algorithm was used to count the number of particles.
The scientists found the most effective mask was the fitted N95 mask without valves, followed by surgical masks and cotton masks, including homemade ones.
The least effective were neck fleeces, or gaiter masks and folded bandanas.
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