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What is the best face mask? Expert breaks down N95, KN95, KF94 and how to spot a fake

Summary
A self-proclaimed “mask nerd” warns that not all face coverings are alike, but the best ones work wonders.His unmasking advice hits as cloth coverings are out and CDC-recommended respirators are in. But all the options present a daunting challenge as omicron lurks, but that’s where mechanical engineer and aerosol science expert Aaron Collins comes to the rescue.

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Boston Herald broke the news in Boston, United States on Saturday, January 22, 2022.
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