While politicians spar over the topic and opponents have staged protests against wearing masks, a growing number of scientific studies support the idea that masks are a critical tool in curbing the spread of the coronavirus.
N95 particulate respirator masks left) block 95% of small airborne particulates in the air, however they are still in short supply and should be reserved for medical workers. Surgical face masks are most effective at protecting others from the wearer's droplets.Victor J. Blue/Bloomberg via Getty Images
N95 particulate respirator masks left) block 95% of small airborne particulates in the air, however they are still in short supply and should be reserved for medical workers. Surgical face masks are most effective at protecting others from the wearer's droplets.Researchers will tell you that masks won't provide foolproof protection. And teasing out the science of masks will take time.
"From what I've seen, I would be comfortable sending my kids back to school if everyone's wearing masks and they're staying as far apart as possible," Marr says. Of course, how much protection a mask provides – both to the wearers and to the people around them – depends on the type of mask and whether you are wearing them properly. N95 respirators are designed to fit tightly around the nose and mouth, so that the air you breathe has to go through the mask; when worn correctly, they block at least 95% of small airborne particles.
As for cloth masks, the protection depends on what they're made out of and how well they fit. But with the right combination of materials, you can create a cloth mask that offers protection to the wearer in the 30% to 50% range
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