Someone will have to make buffs (neck gaiters) with multiple layers of fabric. A recent study showed that the typical buff is worse than no mask at all, as it breaks up the larger particles into smaller ones that aerosolize better.
Pretty much physicists playing with their lasers. Many studies aren’t ready for widespread dissemination by the press.
An actual aerosol scientist disagrees.
Upshot, stop harassing people with gaitors. Harass the FDA instead.
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In response to the Duke study, aerosol scientists have conducted their own gaiter experiments, studying the face covering’s ability to block droplets and whether it is possible to produce smaller particles similar to what the Duke researchers saw. The new research showed that when a single-layer gaiter is worn doubled up, it is highly effective at blocking a range of particle sizes, according to the results of tests done by Linsey Marr, a civil and environmental engineering professor at Virginia Tech who studies aerosols. (In the Duke study, the gaiter tested was not folded over.) Marr’s work has been supplemented by research from Ryan Davis of Trinity University in Texas, who shot water droplets at a strip of woven polyester spandex material taken from a gaiter and did not see any particle breakup or transmission. Meanwhile, Christopher Cappa, a professor at the University of California at Davis, suggested that the high number of particles detected during the Duke gaiter test may be partly due to fibers shedding from the fabric.
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accumed.com
