By now, most supermarkets, grocery stores, and retailers have taken the usual coronavirus precautions, like installing plastic barriers, social distance signage, and masking up workers. But what about all of that chilled, recirculated air, carrying and spreading imperceptible virus particles? Epidemiologists, engineers, and union leaders are asking stores to change and upgrade their air filtration systems to protect against future spread. They’re asking to install hospital-quality systems that trap tiny particles—like the MERV 13 filter. CNN reports that Lidl, a German discount grocery chain, is already making the switch in its American stores.
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