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Danger of Double Masking Against COVID-19
Face shape influences mask fit, suggests problems with double masking against COVID-19. In its updated guidance at the start of 2022, the U.S. Centers for Disease Control and Prevention (CDC) said loosely woven cloth masks offer the least protection against COVID-19, and N95 and KN95 masks offer the most protection. Still, after more than two years since the pandemic began, there is not a full understanding of mask characteristics for the most optimal protection.