That's why a group of researchers at Duke University created a simple technique to analyze the effectiveness of various types of masks which have become a critical component in stopping the spread of the virus.The quest began when a professor at Duke's School of Medicine was assisting a local group buy masks in bulk to distribute to community members in need. The professor wanted to make sure the group purchased masks that were actually effective.
First the test was performed with a speaker talking without wearing a mask. Then they did it again while a speaker was wearing a mask. Each mask was tested 10 times. The most effective mask was the fitted N95. Three-layer surgical masks and cotton masks, which many people have been making at home, also performed well.The 14 masks used in the test.Neck fleeces, also called gaiter masks and often used by runners, were the least effective.
Thank you for showing that actually wearing some masks is worse than not wearing a mask at all
Only an N95 mask or better can filter the virus. Its not even debatable. Science proves this
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THEY MURDER ALL THE WOMEN THAT HAD SEX WITH ME AND ALL OUR CHILDREN.. THEY ARE GETTING OUT OF THE PENETENTIARY IN FORT WORTH EVERY DAY TO DO IT..
Any mask is way better than no mask at all...
Effective At What Exactly? NO MASKS BLOCK A VIRUS. You Mean The SPRAY Blockers The SPIT Filters That's What They Are About,, YOUR DROPLETS. ItsAboutControl
Low tech test. Light a candle. Put on YOUR mask.Get your face about 6 inches from the candle flame and blow ... HARD! If the candle stays lit your mask is adequate.
What he did again?
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