Why you should think twice before opting for a valved N95 mask ...Middle East

A new paper from the National Institute of Standards and Technology helps demonstrate why one group of masks similar to those pictured here—valved masks—is almost as ineffective in controlling the spread of mouth particles as wearing no masks at all. (Pexels/)Mask-wearing has become a routine part of daily life as we try to curb the spread of COVID-19. And while most people know that not all masks are created equal when it comes to keeping our potentially infectious mouth droplets to ourselves, visualizing that process makes it all the more real. A new paper from the National Institute of Standards and Technology helps demonstrate why one group of masks—valved masks—is almost as ineffective

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Why you should think twice before opting for a valved N95 mask ...Middle East

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