二塁打-masking DOESN'T work and might raise 危険 of catching and spreading Covid, 熟考する／考慮する finds ― にもかかわらず US health 長，指導者s STILL recommending it

  • 二塁打-masking does not 改善する how 井戸／弁護士席 mask 保護する against Covid
  • Wearing two coverings 許すs more 粒子s to escape in gaps around masks
  • It can also 'lead to breathing difficulties' if two tight-fitting masks are worn

By Emily Craig Health Reporter For Mailonline

Published: | Updated:

二塁打-masking does not stop people from catching or spreading Covid ― and it might even raise their 危険, a 熟考する／考慮する 示唆するs.

US health 長，指導者s have been advising Americans to 二塁打-up if they can't get their 手渡すs on a 医療の-grade mask since 早期に 2021, （人命などを）奪う，主張するing it 増加するs 保護.

But now 研究員s say wearing two masks may 現実に do the opposite, by creating 'a 誤った sense of 安全' that 原因（となる）s people to take unnecessary 危険.

Wearing two cloth masks can also 軍隊 more 空気／公表する through the gaps between the 直面する, 増加するing the 量 of ウイルス breathed into the 空気／公表する, they 設立する.

The 熟考する／考慮する, which used computer 模擬実験／偽ること?models, looked at cloth masks so the findings do not やむを得ず 適用する to surgical masks or N95s used in hospitals.

However, the 研究員s 公式文書，認めるd that wearing two tight-fitting masks could 原因（となる） 'breathing difficulties'.?

The 中心s for 病気 支配（する）／統制する and 予防 (CDC) recommends wearing a cloth mask on 最高の，を越す of a surgical mask to 達成する a 'better fit and extra 保護'.

A team of US researchers, who measured airflow through and around masks, found double-masking does not improve how well they work and 'produces a false sense of security'. Pictured: Time evolution of cough while wearing a face mask

A team of US 研究員s, who 手段d airflow through and around masks, 設立する 二塁打-masking does not 改善する how 井戸／弁護士席 they work and 'produces a 誤った sense of 安全'. Pictured: Time 進化 of cough while wearing a 直面する mask

専門家s from?Florida 明言する／公表する University and Johns Hopkins University made computer 模擬実験／偽ることs of 3D 長，率いるs based on 100 men and 100 women.

The 研究員s ふりをするd a cough jet from the mouth of the models, which wore a cloth mask over the nose and mouth and elastic hoops wrapped around the ears.

The team calculated the filtration efficiency, which 対策 how much ウイルス-filled droplets are 逮捕（する）d or 封鎖するd by the mask.

The findings, published in the 定期刊行物 Physics of Fluids, show wearing two 直面する coverings 供給する 'ごくわずかの, if any, 増加する in 保護'.

Two masks 'might not 意味ありげに 改善する' the 保護 against breathing out ウイルス 粒子s.

However, they said while it could 'theoretically' 減ずる the 量 of ウイルス that could pass through the mask, if two good-fitting 直面する coverings are worn, it 'could also lead to breathing difficulties'.

A second poor-fitting masks 減少（する）s the 量 of 空気／公表する that can be filtered through the covering?― 軍隊ing more 空気／公表する through any gaps between the mask and 直面する.

They said people could also have a '誤った sense of 安全 when choosing to 二塁打 mask', and therefore be いっそう少なく likely to social distance or take other 警戒s.

二塁打 masking?has become 'more and more popular' for Americans who cannot 接近 the most 効果的な N95 and KN95 masks, the 研究員s said, which makes the findings important.

They said one cloth mask would be better than two, but the best type of mask is one that fits tightly like an?N95 or KN95.

UK health 長，指導者s have 以前 said there is 'insufficient 証拠' to recommend 二塁打-masking.

Covid is おもに spread through droplets an 感染させるd person 解放（する）s when they breathe, speak, cough or sneeze.?

Large 粒子s can land in the nose or mouth of people nearby, while smaller 空輸の droplets stay 一時停止するd in the 空気／公表する can be breathed in.?

証拠 shows that, when worn 正確に, masks can 減ずる the spread of these 粒子s ― but by how much is still contested.

Putting ladie s PANTYHOSE over your 直面する mask makes it better at stopping spread of Covid, 熟考する／考慮する finds

They are a versatile fashion 従犯者 and a 中心的要素 in every woman's wardrobe.

But now 研究員s say wearing ladies tights on your 直面する could 削除する your 危険 of getting Covid.

One of the 批評s 目的（とする）d at 一般的に worn 直面する coverings is that they do not fit tightly enough to 意味ありげに 封鎖する viral 粒子s from 存在 吸い込むd or exhaled.?

As part of a new 熟考する／考慮する, Cambridge University 専門家s reviewed a variety of DIY 切り開く／タクシー／不正アクセスs people have used to make masks fit better, 含むing using rubber 禁止（する）d or tape.

Curiously, they 設立する the most 効果的な 手段 was to 包む pantyhose around the 底（に届く） half of the 直面する ― on 最高の，を越す of a mask.

This, the scientists said, could 減ずる the 量 of viral 粒子s by up to seven times more than a loose mask on its own, by 調印（する）ing the gaps around the nose and mouth.

But recognising the social and physical 関わりあい／含蓄s of wearing tights on your 直面する in public, they 公式文書，認めるd it was 'ありそうもない to be 許容するd for 延長するd periods of time'.?

The 陪審／陪審員団 is still out on how 効果的な mask-wearing is at 減ずるing Covid 感染s at a 全住民 level, with 相反する results from both 味方するs. Most scientists agree that they at least make a small 出資／貢献.

Tight-fitting 医療の grade masks, such as KN95s, are exceptional at 封鎖するing out the ウイルス but they are often 述べるd as uncomfortable and are harder to acquire.

The most ありふれた surgical o r cloth masks are far いっそう少なく 抵抗力のある.?

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