There are various types of masks, from handmade to medical ones, but there is a big difference in the quality of filters that adsorb viruses, and low-quality masks do not have a charged layer that can ...
NEWPORT NEWS, Va. (WAVY) — Not all masks are equal. Just ask Gary Warren, CEO of ivWatch, manufacturer of medical-grade N95 masks. Coverage of mask stories often includes mention of both N95 and KN95 ...
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