In a head-to-head comparison of masks worn by people with active COVID-19, the inexpensive 'duckbill' N95 came out on top, stopping 98% of COVID-19 particles in the breath of infected people from escaping into the air.
Study finds all masks effective, but 'duckbill' N95 masks far outperform others, suggests they should be the standard in high-risk settingsIn a head-to-head comparison of masks worn by people with active COVID-19, the inexpensive 'duckbill' N95 came out on top, stopping 98% of COVID-19 particles in the breath of infected people from escaping into the air.
"Because COVID-19 is airborne, we focused on the extent to which wearing a mask reduces contamination of the air around you," Milton says. This latest study is a continuation of investigations by UMD's Public Health AeroBiology Lab into how contagious respiratory viruses such as influenza contaminate the air.
The duckbill N95 blocked 99% of large particles and 98% of small particles from escaping out of a person's mask. Milton says the design's tight seal, a powerful filter, and large air space for breath to move around all contribute to the duckbill's success. "Our research shows definitively why it's so important to have non-pharmaceutical responses like wearing masks, and why we need studies like this to illuminate which masks are most effective," says Milton.
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