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Health officials have long informed that wearing a face covering - any type of face coating - is useful for slowing the propagation of coronavirus. But a type of face mask is less effective than the rest and could really promote the spread of the disease, say to researchers at Duke University.

Scientists have compared 14 different types of masks in their study, which used laser light to visualize how respiratory droplets passed through different tissues when volunteers talked about a short sentence. It was believed that these drops-extended nose and mouth are the main people are infected with coronavirus.

"We confirmed that when people talk about, small droplets are expelled, then the disease may be widespread by speaking, without coughing or sneezing," said Martin Fischer's main researcher. "We could also see that some face coverings are very better than others in the blocking of expelled particles."

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Starting on the n ° 1: adjusted N95 masks, which blocked the most respiratory droplets, followed by surgical masks and polypropylene masks, a fibrous plastic type used in the tissues.

Worse than not to wear anything

The worst interprets: a fleece of the neck, that the researchers found were actually worse than not to wear any face that covers at all.

Why? The face of the neck was tested seemed to create more droplets by breaking the large in pieces.

"Good sense would dictate that everything wearing is better than not to wear anything - it was not the case here," Fisher said. "We have observed that the number of droplets increased when the speaker put on the fleece of the neck. We believe that the equipment of our fleece breaks down from large droplets emitted during several smaller. This could bring such a mask. -Productive, because smaller droplets have once easier to take away by drafts and endanger people nearby. "

Continue to hide

More research is definitely necessary: ​​it is difficult to know if it is the material of the specific fleece tested - or the structure of a fleece itself, which around your head like a high tube for your face caused this Proliferation effect of droplets. (And researchers from the DUC stated that they were primarily studied the laser device, and no which mask tissues.)

In the meantime, Mask Up-but it's a good idea to search for the types of facial coverage you are using.

And to cross this pandemic with your healthiest, do not miss theseThings you should never do during the pandemic coronavirus.