Doubling up on masks adds to obstacle course for COVID particles, research shows - CBS News

It creates more of an "obstacle course" for particles to make their way through into the body, research shows.
It creates more of an obstacle course for particles to make their way through into the body, research shows.

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Lehigh University urges double-masking, takes other precautions as

Doubling Up On Masks Adds To 'Obstacle Course' For COVID Particles

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Double masking can block 92% of infectious particles, CDC says