Which mask 申し込む／申し出s the best 保護? An N99 is the most 効果的な at 減ずるing 危険 of 契約ing coronavirus while using a cotton T-shirt as a cover-up barely 供給するs any 障壁, 熟考する／考慮する finds

  • 研究員s looked at 12 types of 直面する mask and calculated how 効果的な they were at 減ずるing coronavirus 感染?危険
  • N99 masks, which filter?out 99% of 粒子s, lowered the 危険 by 99% in 30-second settings and by 94% in 20-minute シナリオs
  • The next most 効果的な were N95 masks, surgical masks and vacuum cleaner filters that can be 挿入するd into cloth masks
  • Scarves 減ずるd 危険 by 44% after 30 seconds and by 24% after 20 minutes, and cotton T-shirts were just a little better than not wearing any mask

By Mary Kekatos 上級の Health Reporter For Dailymail.com

Published: | Updated:

We've all been told to wear 直面する masks to 減ずる the spread of coronavirus, but it turns out the 構成要素 your mask is made of may 影響する／感情 your 危険, a new 熟考する／考慮する 示唆するs.

An N99 mask, which filters out nearly all 粒子s both large and small, 減ずるd the 半端物s of 契約ing COVID-19, the 病気 原因（となる）d by the ウイルス, by 99 パーセント.?

But a simple cotton T-shirt or scarf tied around the 直面する was far いっそう少なく 効果的な and only 減ずるd the 危険 by about one-４半期/4分の1.

The team, from the University of Arizona, says the findings 供給する 証拠 that not all 直面する masks are created 平等に and can give Americans advice on what to and not to wear when going out in public.?

N99 masks (pictured) which filter out 99% of particles, lowered the risk of coronavirus infection by 99% in 30-second settings and by 94% in 20-minute scenarios

N99 masks (pictured) which filter out 99% of 粒子s, lowered the 危険 of coronavirus 感染 by 99% in 30-second settings and by 94% in 20-minute シナリオs

Scarves reduced risk by 44% after 30 seconds and by 24% after 20 minutes, and cotton T-shirts were just a little better than not wearing any mask. Pictured: A man wearing a raccoon mask in an area being called the Capitol Hill Autonomous Zone (CHAZ)

Scarves 減ずるd 危険 by 44% after 30 seconds and by 24% after 20 minutes, and cotton T-shirts were just a little better than not wearing any mask. Pictured: A man wearing a raccoon mask in an area 存在 called the （ワシントンの）連邦議会議事堂 Hill 自治権のある Zone (CHAZ)

For the 熟考する／考慮する, published in the 定期刊行物 of American 感染s, the team looked at 12 different types of masks and collected data from several 熟考する／考慮するs of mask efficacy.

Next, they created a computer model to ふりをする how 井戸／弁護士席 different masks would 保護する ins short, 30 -second シナリオs and long, 20-minute シナリオs.

研究員s factored for the 容積／容量 of 空気／公表する a person 吸い込むs over time and the 量 of ウイルス 集中 in the 空気／公表する.?

Unsurprisingly, wearing any type of 直面する covering was 設立する to 減ずる 感染 危険s between 24 パーセント and 99 パーセント.

Results showed that N99 masks, which are designed to 妨げる 99 パーセント of 粒子s from getting in, were the most 効果的な.?

After N99 masks, the next most effective were N95 masks, surgical masks and vacuum cleaner filters that can be inserted into cloth masks (above)

After N99 masks, the next most 効果的な were N95 masks, surgical masks and vacuum cleaner filters that can be 挿入するd into cloth masks (above)

They 減ずるd the 普通の／平均（する） 危険 by 99 パーセント in 30-second settings and by 94 パーセント in 20-minute シナリオs.

'N99 masks, which are even more efficient at filtering 空輸の 粒子s than N95 masks, are 明白に one of the best 選択s for 封鎖するing the ウイルス,' lead author Amanda Wilson, an 環境の health sciences doctoral 候補者 at the University of Arizona, said in a 声明.

'But?they can be hard to come by, and there are 倫理的な considerations such as leaving those 利用できる for 医療の professionals.'???

The next best 選択s were the 井戸／弁護士席-known N95 mask, a surgical mask, and - 突然に - vacuum きれいにする filters, which can be 挿入するd into cloth masks.?

Vacuum filters 減ずるd 感染 危険 by 83 パーセント in 30-second シナリオs and 58 パーセント in 20-minute settings.?

の中で other nontraditional 構成要素s, the ones 設立する most 効果的な by the 研究員s were?tea towels, cotton-blend fabrics and antimicrobial pillowcases.?

Scarves only red uced 感染 危険 by 44 パーセント after 30 seconds and by 24 パーセント after 20 minutes, and cotton T-shirts were just a little better than not wearing any mask.

Wilson explained that dense 繊維s are better at filtering than fabrics that are thinner.?????

'That's why higher thread counts lead to higher efficacy. There's just more to 封鎖する the ウイルス,' she said.?

'But some masks (such as those made from silk) also have electrostatic 所有物／資産／財産s, which can attract smaller 粒子s and keep them from passing through the mask 同様に.'??

For a mask to be 効果的な, Wilson says it should pinch at the nose to form a 調印（する） and never sit under the nostrils.

'Proper use of masks is so important,' Wilson said.?

'Also, we were 焦点（を合わせる）ing on masks 保護するing the wearer, but they're most important to 保護する others around you if you're 感染させるd. If you put いっそう少なく ウイルス out into the 空気／公表する, you're creating a いっそう少なく 汚染するd 環境 around you.'?

Wilson points out that no mask can 減ずる 感染 危険 to 無 so it's important to remember to socially distance, wash your 手渡すs and wear a mask in public.