Search
Confirm
Cancel
Language
NEWS CENTER
Feel free to contact us and our R&D and production teams will provide the best tailor-made service for all OEM customers.
Location:
Home
/
/
/
Here’s the Science Behind How Face Masks Prevent Coronavirus

Here’s the Science Behind How Face Masks Prevent Coronavirus

  • Categories:Disposable mask
  • Author:
  • Origin:
  • Time of issue:2020-11-01
  • Views:0

(Summary description)As states reopen from stay-at-home orders, many, including California, are now requiring people to wear face coverings in most public spaces to reduce the spread of COVID-19.

Here’s the Science Behind How Face Masks Prevent Coronavirus

(Summary description)As states reopen from stay-at-home orders, many, including California, are now requiring people to wear face coverings in most public spaces to reduce the spread of COVID-19.

  • Categories:Disposable mask
  • Author:
  • Origin:
  • Time of issue:2020-11-01
  • Views:0
Information

As states reopen from stay-at-home orders, many, including California, are now requiring people to wear face coverings in most public spaces to reduce the spread of COVID-19.

Both the Centers for Disease Control and Prevention (CDC) and the World Health Organization now recommend cloth masks for the general public, but earlier in the pandemic, both organizations recommended just the opposite. These shifting guidelines may have sowed confusion among the public about the utility of masks.

But health experts say the evidence is clear that masks can help prevent the spread of COVID-19 and that the more people wearing masks, the better.6801602308576747.jpg

Why did the CDC change its guidance on wearing masks?

The original CDC guidance partly was based on what was thought to be low disease prevalence earlier in the pandemic, said Chin-Hong.

“So, of course, you’re preaching that the juice isn’t really worth the squeeze to have the whole population wear masks in the beginning – but that was really a reflection of not having enough testing, anyway,” he said. “We were getting a false sense of security.”

Rutherford was more blunt. The legitimate concern that the limited supply of surgical masks and N95 respirators should be saved for health care workers should not have prevented more nuanced messaging about the benefits of masking. “We should have told people to wear cloth masks right off the bat,” he said.

Another factor “is that culturally, the U.S. wasn’t really prepared to wear masks,” unlike some countries in Asia where the practice is more common, said Chin-Hong. Even now, some Americans are choosing to ignore CDC guidance and local mandates on masks, a hesitation that Chin-Hong says is “foolhardy.”

What may have finally convinced the CDC to change its guidance in favor of masks were rising disease prevalence and a clearer understanding that both pre-symptomatic and asymptomatic transmission are possible – even common. Studies have found that viral load peaks in the days before symptoms begin and that speaking is enough to expel virus-carrying droplets.

“I think the biggest thing with COVID now that shapes all of this guidance on masks is that we can’t tell who’s infected,” said Chin-Hong. “You can’t look in a crowd and say, oh, that person should wear mask. There’s a lot of asymptomatic infection, so everybody has to wear a mask.”

What evidence do we have that wearing a mask is effective in preventing COVID-19?

There are several strands of evidence supporting the efficacy of masks.

One category of evidence comes from laboratory studies of respiratory droplets and the ability of various masks to block them. An experiment using high-speed video found that hundreds of droplets ranging from 20 to 500 micrometers were generated when saying a simple phrase, but that nearly all these droplets were blocked when the mouth was covered by a damp washcloth. Another study of people who had influenza or the common cold found that wearing a surgical mask significantly reduced the amount of these respiratory viruses emitted in droplets and aerosols.

But the strongest evidence in favor of masks come from studies of real-world scenarios. “The most important thing are the epidemiologic data,” said Rutherford. Because it would be unethical to assign people to not wear a mask during a pandemic, the epidemiological evidence has come from so-called “experiments of nature.”

images (1).jpg

Do masks protect the people wearing them or the people around them?

“I think there’s enough evidence to say that the best benefit is for people who have COVID-19 to protect them from giving COVID-19 to other people, but you’re still going to get a benefit from wearing a mask if you don’t have COVID-19,” said Chin-Hong.

Masks may be more effective as a “source control” because they can prevent larger expelled droplets from evaporating into smaller droplets that can travel farther.

Another factor to remember, noted Rutherford, is that you could still catch the virus through the membranes in your eyes, a risk that masking does not eliminate.

Does the type of mask matter?

Studies have compared various mask materials, but for the general public, the most important consideration may be comfort. The best mask is one you can wear comfortably and consistently, said Chin-Hong. N95 respirators are only necessary in medical situations such as intubation. Surgical masks are generally more protective than cloth masks, and some people find them lighter and more comfortable to wear.

The bottom line is that any mask that covers the nose and mouth will be of benefit.

“The concept is risk reduction rather than absolute prevention,” said Chin-Hong. “You don’t throw up your hands if you think a mask is not 100 percent effective. That’s silly. Nobody’s taking a cholesterol medicine because they’re going to prevent a heart attack 100 percent of the time, but you’re reducing your risk substantially.”

Scan the QR code to read on your phone

Previous: None
Next: None
Previous: None
Next: None

Related Products

  Disposable 3ply Earloop Non Woven Face Mask
Disposable 3ply Earloop Non Woven Face Mask
The products are mainly sold to the United States, Italy, Japan, the United Kingdom, France, Russia, etc. Hire professional staff to serve customers.The Dust-Proof 3-Layers Non Woven Face Masks for Personal Health widely used for people daily working social activities, the disposable mask is suitable for covering the mouth, nose and lower jaw of a user, and is used for wearing, blocking exhaled or ejected pollutants from the oral cavity and nasal cavity in a common environment.
 Men incontinence panty liner guards
Men incontinence panty liner guards
Our male panty liner pads have a special odor controlling properties, they will help you stay active and involved with work, recreational activities The innovative shape designed especially for men will provide a comfortable fit and absorbtion reliability against bladder control problems and bladder leakage.
 Incontinence panty liner pads male guards
Incontinence panty liner pads male guards
Our male panty liner pads have a special odor controlling properties, they will help you stay active and involved with work, recreational activities The innovative shape designed especially for men will provide a comfortable fit and absorbtion reliability against bladder control problems and bladder leakage.
 urinary incontinence pads for men
urinary incontinence pads for men
Our male panty liner pads have a special odor controlling properties, they will help you stay active and involved with work, recreational activities The innovative shape designed especially for men will provide a comfortable fit and absorbtion reliability against bladder control problems and bladder leakage.
 Extra absorbrnt male panty liners
Extra absorbrnt male panty liners
Our male panty liner pads have a special odor controlling properties, they will help you stay active and involved with work, recreational activities The innovative shape designed especially for men will provide a comfortable fit and absorbtion reliability against bladder control problems and bladder leakage.
 Male incontinence panty liner pads
Male incontinence panty liner pads
Our male panty liner pads have a special odor controlling properties, they will help you stay active and involved with work, recreational activities The innovative shape designed especially for men will provide a comfortable fit and absorbtion reliability against bladder control problems and bladder leakage.
 fluff pulp nonwoven surface disposable baby underpad
fluff pulp nonwoven surface disposable baby underpad
Disposable Bed Wetting Mats are comfortable, absorbent and feature a waterproof backing. They are designed and intended to protect against bed wetting. They work on beds just as well as on other household furniture and surfaces. Our pad has 5 layers of protection, which can quickly absorb the liquid while locking the liquid from leaking out.
 hospital medical disposable underpad different size
hospital medical disposable underpad different size
Disposable Bed Wetting Mats are comfortable, absorbent and feature a waterproof backing. They are designed and intended to protect against bed wetting. They work on beds just as well as on other household furniture and surfaces. Our pad has 5 layers of protection, which can quickly absorb the liquid while locking the liquid from leaking out.
 hospital medical disposable underpad different size
hospital medical disposable underpad different size
Disposable Bed Wetting Mats are comfortable, absorbent and feature a waterproof backing. They are designed and intended to protect against bed wetting. They work on beds just as well as on other household furniture and surfaces. Our pad has 5 layers of protection, which can quickly absorb the liquid while locking the liquid from leaking out.
Fax

0086-519-85509592

Add

Qianhuang Industrial Concentration Zone, 
Wujin District, Changzhou City, Jiangsu Province

留言应用名称:
底部留言
描述:
验证码

Copyright © 2021  Zhenjiang Cherish Consumer Products Co., Ltd.,  www.300.cn  苏ICP备20029981号  IPV6