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Disease and Prevention Control Centers (CDC) made titles on December 2 when theyannounced a change in guide Covid major This cut the duration of the recommended quarantine of 14 to 7 days in some cases. But the CDC was not the only major health agency to modify its coronavirus guidelines this week. The World Health Organization (WHO) has also taken the time to update itsFACIAL MASK RECOMMENDATIONS, tightening the rules on when and where they should be worn. But theWhich was also clear to specify thatType of facial coating will not do enough to protect you: a face shield. Read it to discover the changes and for more information on the mask to avoid, consultIf your face mask has one, stop it immediately.

In the update published on December 1, WHO carefully emphasized that the use of facial masks isGreater than the use of face shields Because they do not block the droplets exhaled from the wearer and can not prevent them from inhaling droplets either.

Apart from being used in combination with a mask, the one that described a specific situation in which they could be taken into account. "In the context of COVID-19, some children may not be able to wear a mask because of a specific disability or situations such as speaking classes where the teacher should see their mouths," read the lines . "In these cases, the front shields can be considered an alternative to masks, but they do not provide equivalent protection to maintain the virus to be transmitted to others."

The updated recommendations also indicate that any face shield used "should cover the entire face, wrapping around the sides of the face and extend below the chin. Caution should be taken while wearing one to avoid injuries that could Break it and harm eyes or face. "

The CDC also hasindicated that face shields are not an acceptable replacement For facial masks. "Face shields have large gaps below and next to the face, where your breathable droplets can escape and join others around you," warns the guidelines of the agency. "At that time, we do not know how much protection a face shield provides people around you."

Of course, find theright face mask is complicated too. Read it to find out if your mask is up to tobacco to prize, and for more reasons why wearing face masks could be important in the coming weeks, discoverTo what extent you are likely to catch COVID in next month, expert says.

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Virginia Tech University Scientists RecentlyTested 11 different types of face masks, of which nine fabric masks made from materials such as coffee filters, a cotton t-shirt and other fabrics and a face shield and a surgical mask, Yahoo! The news.

The results indicated a clear winner. "We now recommend based on this study thatPeople use a three-layer mask," notedLinsey Marr, PhD, a leading aerosol scientist in Virginia Tech and co-author of the study at a press conference of 23 Nov 23. More specifically, Marr recommends a mask in which "the two external layers are a tightly woven but flexible material that allows the mask to comply with your face, "with a layer in vacuum bag or filtration material in the middle. And for more information on the latest COVID news, discoverThese 2 places could end soon, the White House warns.

Having a breathing vent on your mask can make you feel more comfortable, but health agencies agree so that they are completely ineffective to stop the propagation of COVID-19. According to a visualization study conducted by research engineers at the National Institute of Standards and Technology (NIST), while medical grade N95 masks completely stop the passage of droplets,N95 masks with a fan valveDo nothing to stop propagation. In fact, the droplets have almost so far as far as possible with a mask with a fan as they did in casesWithout any kind of face recovery at all.

"When you compare the videos side by side, the difference is striking,"Matthew RestmatesThe NIST research engineer who created visualization, said in a statement. "These videos show how the valves allow the air to leave the mask without filtering, which defeats the goal of the mask." And for more times when the PPE is a thing of the past, checkThat's exactly when Dr. Fauci says we can "throw our masks away".

A recent meta-analysis published in the journalBmj Open analyzed data from a 2015 study on theEfficiency of fabric face coatingsAgainst seasonal influenza, cold viruses called rhinovirus and genetically similar coronaviruses. The researchers noted that do not clean up your mask daily created a high risk of contracting coronavirus.

"Fabric masks and surgical masksshould be considered "contaminated" after use, "RAINA MACINTYRE, PhD, who led the study, said in a statement. "Unlike surgical masks, which are eliminated after use, fabric masks are reused. Although it can be tempting to use the same mask for several days in a row, or give it a hand wash or a fast wiping , Our research suggests that this increases the risk of contamination. "And for more mask errors to avoid, checkIt's the only thing that makes your unnecessary mask, scientists say.

Just because you have a mask on your face does not mean that it does its job. Wear it under your nose, pulling it under your chin to talk, or wear an amplified mask, virtually deny the benefits of wearing one at all.

On one onlineMathematical Transmission Model Covid Developed by a pair of scientists from Massachusetts Institute of Technology (MIT), wearing a surgical quality mask in a 20-foot 20-foot room with 10 people, it is sufficiently safe to spend two hours together without risk of exposure to the virus. But factoring in the people of the room could pull their masks below their nose or wearing one that is not suitable correctly, the amount of security time fell to only 32 minutes. And for more about it, checkIt only takes it long to get Covid in a room with someone who has it.