A recent study, but not peer-reviewed, has found that 3M surgical masks - the type of surgeon worn in the operating room - can remove nearly 75% of particles up to 0.02 in size. micrometer. Although less effective than the N95 respirator, surgical masks can still help reduce the number of inhaled particles. But by cutting a hole in the heel of the sock and wearing it on a mask can improve the ability of the mask and filter up to 90% of particles. "There is a very important question - let the health authorities explain from the data we are collecting - about what level of filtering is 'safe enough'? It's a pity but it is true in some schools. if we have to choose between many imperfect choices. " Tests on homemade masks show they can significantly reduce the spread of other viruses like the flu. They can also help reduce the spread of viruses on nearby surfaces when people cough.
Assuming a sufficient number of people wear masks when going out in public, this can have a huge impact on how quickly the corona virus begins to spread back, especially when combined with measures. other like social isolation and hand washing. An unpublished study by scientists at Arizona State University shows that if 80% of people only wear a mask that is moderately effective, the number of deaths in New York could be reduced by 17-45% in the time period. space two months. Even wearing a mask that is only 20% effective can reduce mortality by 24-65% in Washington and 2-9% in New York, if enough people wear it.
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