- 6 Mar 2003
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Properly-fitted. But how does it compare to other situations?
BTW this report supports double-masking.
www.webmd.com
Wearing a tight-fitting surgical mask, or doubling up on masks, can significantly reduce COVID-19 transmission and slow the spread of new, more contagious strains, according to a CDC report released Wednesday.
Researchers found that if two people are both wearing surgical masks that are knotted and tucked flush to the face -- or if both are wearing a cloth mask over a surgical mask -- exposure to viral particles is cut by more than 95%.
"The data in this report underscore the finding that good fit can increase overall mask efficiency," the authors wrote. "Multiple simple ways to improve fit have been demonstrated to be effective."
A "simulated breathing experiment" shows surgical masks on their own block 42% of COVID-19 particles for the wearer, and cloth masks block about 44% of particles. Wearing a cloth mask over a surgical mask increased protection for the person wearing the masks, blocking 83% of small particles.
BTW this report supports double-masking.
Coronavirus (COVID-19) Overview
COVID-19 is a new type of coronavirus that causes mild to severe cases. Here’s a quick guide on how to spot symptoms, risk factors, prevent spread of the disease, and find out what to do if you think you have it.
Wearing a tight-fitting surgical mask, or doubling up on masks, can significantly reduce COVID-19 transmission and slow the spread of new, more contagious strains, according to a CDC report released Wednesday.
Researchers found that if two people are both wearing surgical masks that are knotted and tucked flush to the face -- or if both are wearing a cloth mask over a surgical mask -- exposure to viral particles is cut by more than 95%.
"The data in this report underscore the finding that good fit can increase overall mask efficiency," the authors wrote. "Multiple simple ways to improve fit have been demonstrated to be effective."
A "simulated breathing experiment" shows surgical masks on their own block 42% of COVID-19 particles for the wearer, and cloth masks block about 44% of particles. Wearing a cloth mask over a surgical mask increased protection for the person wearing the masks, blocking 83% of small particles.