/cdn.vox-cdn.com/uploads/chorus_asset/file/21822002/LG_PuriCare_Wearable_Air_Purifier___LIFESTYLE.jpg "LG officially announces its battery-powered air purifier mask - The Verge")
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:no_upscale()/cdn.vox-cdn.com/uploads/chorus_asset/file/15959137/2018_07_16_16.57.34_1.jpg "As pollution gets worse, air-filtering face masks get fashionable - Vox")
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Conversion of self-contained breathing apparatus mask to open source powered air-purifying particulate respirator for fire fighter COVID-19 response - ScienceDirect
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