Grinshpun says they are very short supply because of the demand in China and other places and the price, which used to be a little more than a dollar a piece has skyrocketed.
“This N95 was developed for workers in industry or medicine and not the general public,” he says. “The workers in this country are usually fit-tested. It’s done with a sophisticated apparatus which measures the concentration of particles inside and outside of a respirator donned on an individual performing certain exercises to determine the fit. If the fit is not acceptable, a worker may be offered a different size or type or respirator.”
Fit-testing can be expensive with the apparatus costing roughly $10,000, and requiring a qualified operator, says Grinshpun. Proper training should also be provided for wearers. “Now imagine if you want to take care of a large population in a short time. A respirator fit testing for the general public is an enormous task.”
2020欧洲杯预赛最新积分榜Respiratory protection research and development is a booming area in terms of economics because the current global outbreak is probably not the last one.
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