Tag: Wearing

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Ought to Folks Who Took The Covid-19 Vaccine Begin Sporting Masks Once more?

Should People Who Took The Covid-19 Vaccine Start Wearing Masks Again?

Since the delta variant is spreading among the unvaccinated, many fully vaccinated people also worry. Is it time to mask again?

While there is no one-size-fits-all answer to the question, most experts agree that masks remain a wise precaution in certain situations for both vaccinated and unvaccinated people. How often you use a mask depends on your personal health tolerance and risk, the infection and vaccination rates in your community, and who you spend time with.

The bottom line is this: while a full vaccination protects against serious illness and hospitalization from Covid-19, no vaccine offers 100 percent protection. As long as large numbers of people remain unvaccinated and the coronavirus continues to spread, those vaccinated will be exposed to the Delta variant and a small percentage of them will develop what are known as breakthrough infections. Here you will find answers to frequently asked questions about how to protect yourself and reduce your risk of a breakthrough infection.

To decide if a mask is needed, first ask yourself these questions.

  • Are the people I am with also vaccinated?

  • What is the fall and vaccination rate in my community?

  • Will I be in a poorly ventilated indoor or outdoor area? Will the increased risk of exposure last a few minutes or hours?

  • How high is my personal risk (or the risk to my fellow human beings) for complications from Covid-19?

Experts agree that you don’t need to wear a mask if everyone you are with is vaccinated and symptom-free.

“I don’t wear a mask when hanging out with other people who have been vaccinated,” said Dr. Ashish K. Jha, Dean of Brown University School of Public Health. “I don’t even think about it. I go to the office with a few people and they are all vaccinated. I’m not worried. “

But once you venture into closed public spaces, where the chances of encountering unvaccinated people are greater, a mask is probably a good idea. A full vaccination remains the strongest protection against Covid-19, but the risk is cumulative. The more opportunities you give the virus to challenge the antibodies you made with your vaccine, the higher your risk of exposure to exposure so great that the virus breaks the protective barrier of your immune system.

Because of this, your community’s fall and vaccination rate is one of the most important factors influencing mask needs. For example, in Vermont, Massachusetts, Connecticut, and Rhode Island, more than 70 percent of adults are fully vaccinated. In Alabama, Mississippi, and Arkansas, fewer than 45 percent of adults are vaccinated. In some counties, overall vaccination rates are far lower.

“We are currently two Covid nations,” said Dr. Peter Hotez, dean of the National School of Tropical Medicine at Baylor College of Medicine and co-director of the Center for Vaccine Development at Texas Children’s Hospital. In Harris County, Texas, where Dr. Hotez is alive, case numbers are up 114 percent in the past two weeks, and only 44 percent of the community is fully vaccinated. “I wear a mask indoors most of the time,” said Dr. Hotez.

Finally, masking is more important in poorly ventilated indoor spaces than outdoors, where the risk of infection is extremely low. Dr. Jah notices that he recently stormed into a cafe, exposed because vaccination rates are high in his area, and was only there for a few minutes.

Your personal risk also counts. If you are elderly or have immunocompromised your antibody response to the vaccine may not be as strong as a young person’s response. It is a good idea to avoid crowded rooms and wear a mask if you are indoors and do not know the vaccination status of those around you.

Use the Times tracker to find vaccination rates and case numbers in your area.

When the US Centers for Disease Control and Prevention announced that people who had been vaccinated could forego wearing masks, the number of cases declined, vaccinations increased, and the highly contagious Delta variant had not yet caught on. Since then, Delta has spread rapidly and now accounts for more than 83 percent of cases in the United States.

It is known that people infected with the Delta variant shed much higher amounts of the virus over longer periods of time compared to previous lines of the coronavirus. A preliminary study estimated that viral loads are 1,000 times higher in people with the delta variant. These high viral loads give the virus more opportunities to challenge your antibodies and breach your vaccine protection.

“This is twice as transferable as the original line from Covid,” said Dr. Hotez. “The reproductive number of the virus is around 6,” he said, referring to the number of people a virus carrier is likely to infect. “That means that 85 percent of the population must be vaccinated. Only a few areas of the country achieve that. “

Updated

July 22, 2021, 1:43 p.m. ET

The answer depends on your personal risk tolerance and the level of vaccinations and Covid-19 cases in your community. The more time you spend with unvaccinated people in closed rooms for a long time, the higher the risk of crossbreeding with the Delta variant or other variants that may appear.

Large gatherings, by definition, offer more opportunities to contract the coronavirus, even if you are vaccinated. Scientists have documented breakthrough infections at a recent Oklahoma wedding and July 4th celebrations in Provincetown, Massachusetts.

But even with the Delta variant, a full vaccination seems to be around 90 percent effective to prevent serious illnesses and hospital stays caused by Covid-19. However, if you are at a very high risk of complications from Covid-19, you should consider avoiding risky situations and wearing a mask if the vaccination status is unknown to those around you.

Healthy vaccinated people with a low risk of complications have to decide what personal risk they want to accept. Wearing a mask at large indoor gatherings will reduce the risk of infection. If you are healthy and vaccinated but are caring for an aging parent or spending time with others at high risk, you should also consider their risk when deciding whether to attend an event or wear a mask.

“When I go into a public area, I usually wear a mask,” said Dr. Hotez. “Until recently, I used to take my son and his girlfriend out to a restaurant for dinner and I wouldn’t wear a mask because the broadcast was so advanced. Now I’m not so sure. I can change the way I think about restaurants while Delta is getting faster. “

Breakthrough infections get a lot of attention because people who have been vaccinated talk about them on social media. If breakthrough infection clusters occur, it is also reported in science journals or in the media.

However, it’s important to remember that while breakthrough cases are relatively rare, they can still happen no matter what vaccine you’re given.

“No vaccine is 100 percent effective at preventing disease in vaccinated people,” says its CDC website. “There will be a small percentage of fully vaccinated people who will still get sick, hospitalized, or die of Covid-19.”

A breakthrough case doesn’t mean your vaccine isn’t working. In fact, most breakthrough infection cases result in no symptoms or only mild illness, which shows that the vaccines are working well to prevent serious illness from Covid-19.

As of July 12, more than 159 million people in the United States were fully vaccinated against Covid-19. Of these, only 5,492 had breakthrough cases that resulted in serious illness. including 1,063 who died. That’s less than 0.0007 percent of the vaccinated population. Now 99 percent of Covid-19 deaths are among the unvaccinated.

Many infectious disease experts are frustrated that the CDC only documents cases where a vaccinated person with Covid-19 is hospitalized or dies. But many breakthrough infections are still being discovered in asymptomatic people who are frequently tested, such as baseball players and Olympic athletes. Many of these people travel or spend long periods of time in close quarters with others.

“Sports figures are different,” said Dr. Yeh. “Part of the problem is that they also encounter a lot of unvaccinated people, even in their own small circle.”

If you’re fully vaccinated and know you’ve been exposed to someone with Covid-19, it’s a good idea to get tested even if you don’t have symptoms.

And if you have cold symptoms or other signs of infection, experts agree that you should be tested. Many vaccinated people who do not wear masks have caught colds in the summer, which lead to runny nose, fever and cough. But it’s impossible to tell the difference between a summer cold and Covid-19. Anyone with cough or cold symptoms should wear a mask to protect their surroundings and get tested to rule out Covid-19. It’s a good idea to have a few Covid tests on hand at home as well.

“If I woke up one morning and had symptoms of a cold, I would put on a mask at home and get tested,” said Dr. Yeh. “I don’t want to cause breakthrough infections in other members of my family, and I don’t want to give it to my 9 year old child.”

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Health

Fauci says vaccinated individuals ‘would possibly wish to contemplate’ sporting masks indoors

Fauci says vaccinated people 'might want to consider' wearing masks indoors

White House senior medical advisor Dr. Anthony Fauci said people who are fully vaccinated should consider wearing masks indoors as a precaution against the rapidly spreading Delta variant in the US

“If you want to walk that extra mile of safety indoors, especially in crowded places, despite being vaccinated, consider wearing a mask,” Fauci said in an interview with CNBC on Wednesday.

Some areas of the United States are reintroducing mask requirements due to spikes in cases. The more transmissible Delta variant now accounts for around 83% of the sequenced Covid-19 cases in the country, according to the Centers for Disease Control and Prevention.

“It is recommended that you wear a mask if you find yourself in an indoor situation where virus dynamics are high in the community,” Fauci said.

He also said US officials are concerned they are seeing more breakthrough infections in fully vaccinated people in the US, even if they are milder cases.

“Of course we don’t want to see that,” he said, noting that the Delta variant is highly transferable. “This virus is very different from the viruses and variants that we have previously experienced. It has an exceptional ability to transmit from person to person.”

The portability of variants from the original strain has increased, and some have been shown to decrease the effectiveness of vaccines.

“Viruses don’t mutate unless you allow them to replicate and spread through the community. You give them ample time and opportunity to mutate and you have a new variant,” Fauci said. “The easiest, best and most effective way to prevent the emergence of a new variant and destroy the existing Delta variant is to have everyone vaccinated.”

In the United States, 99.5% of Covid deaths are now among unvaccinated people. “This is a statistic that speaks for itself,” said Fauci.

Despite the spike in new cases, Fauci said he doesn’t think US officials will renew calls for a statewide mask mandate “because there will be a lot of headwinds.”

Local counties and private companies may choose to enforce mask requirements as the delta variant spreads more widely in unvaccinated areas of the country. Currently, nearly two-thirds of counties in the United States have vaccinated less than 40% of their residents.

Colleges and universities have also brought the question of mandatory vaccinations to court. Indiana University recently got the go-ahead from a federal judge to require vaccines for college students entering the fall semester.

Fauci said he doesn’t see any comeback from lockdowns anytime soon.

“I don’t see that on the horizon right now,” said Fauci. “What I’m seeing is more tests and more local mandates and a lot of pressure to get people vaccinated.”

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What Satisfied Me to Begin Sporting Solar Safety

What Convinced Me to Start Wearing Sun Protection

Alas, those of us in the upper decades of life knew little in our younger years about the risks of sun damage beyond the need to avoid a bad sunburn. Many youngsters like me swam, hiked, biked and played sports minimally clothed while the sun tanned or burned our skin. We sunbathed coated in baby oil in a misguided effort to acquire a rich tan. And many of us, myself included, failed to reach adulthood with sun-protective habits that could have prevented the skin damage now woefully apparent.

Given that the risk of ultraviolet light to healthy skin has since been widely publicized, I’m astonished at how many people today visit tanning salons or use tanning beds at home, damaging the wholesome cutaneous barrier nature gave us.

Happily, the new study suggests that more people now have a greater understanding and respect for the sun’s effects on skin and can look forward to a healthier future, said Dr. Sangeeta Marwaha, a dermatologist in Sacramento and co-author of the study. Among people who entered the study in 2018, the risk of developing skin cancer was two-thirds that of study entrants in 2008 who were followed for an equal number of years.

“There’s been an increase in sun-protective habits and a resulting decrease in the development of skin cancer,” Dr. Marwaha said in an interview. “Parents today are more likely to protect their children from undue sun exposure, and the use of sunscreen is now more mainstream.”

But there’s still a long way to go. Fostering a healthy respect for sun protection in young children is especially important because some experts estimate that up to 80 percent of a person’s lifetime sun exposure is acquired before age 18.

Repeated exposure to the sun’s ultraviolet radiation causes most of the skin changes — wrinkles, age spots and tiny broken blood vessels — generally considered a normal result of aging. Yes, aging plays a role, but these effects occur much earlier in life on sun-exposed skin. UV light damages the elastin fibers in skin, causing it to stretch, sag and wrinkle. It also damages surface blood vessels, rendering them more fragile and easily bruised.

And Zachary W. Lipsky, a biomedical engineer at Binghamton University, found that UV radiation weakens the bonds that help the cells in the top layer of skin stick together, damaging the skin’s structural integrity and leaving it more vulnerable to infection.

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Do We Nonetheless Must Hold Carrying Masks Open air?

Do We Still Need to Keep Wearing Masks Outdoors?

If you stop having a long conversation with someone who isn’t vaccinated, masks are recommended. Even outdoors, the longer and closer you stand, the greater the risk of breathing someone else’s air. One of the few documented cases of outdoor transmission occurred at the start of the pandemic in China, when a 27-year-old man stopped to chat outside with a friend who had just returned from Wuhan, where the virus originated. Seven days later, he had his first symptoms of Covid-19.

Updated

April 25, 2021, 5:06 p.m. ET

And masks are still recommended if you are in a crowd outside. Standing shoulder to shoulder with strangers during an outdoor concert or protest can increase the risk, especially for the unvaccinated.

Recently, when she was hiking without a mask, Dr. Marr, she still tried to keep her distance from large groups when the path was crowded.

“When I passed a solo hiker it was none of my business,” said Dr. Marr. “But when I passed a group of 10 hikers in a row, I continued to step off the path. The risk is still small, but at some point there could be enough people for the risk to be felt. “

Take your dog for a walk, ride a bike, hike a trail, or have a picnic with members of your household or vaccinated friends. These are activities where the risk of virus exposure is negligible. In such situations, you can have a mask in your pocket in case you find yourself in a crowd or need to go into the house.

“I think it’s a little too much to ask people to put the mask on when they’re walking, jogging, or biking,” said Dr. Muge Cevik, Clinical Lecturer in Infectious Diseases and Medical Virology at the University of St Andrews School of Medicine in Scotland, where outdoor masking was never required. “We are at a different stage of the pandemic. I think outside masks shouldn’t have been required at all. Infection and transmission do not take place here. “

“Let me run, maskless. Mask in your pocket, “tweeted Dr. Nahid Bhadelia, an infectious disease physician and medical director of the Department of Specific Pathogens at Boston Medical Center. “Given the conservative opinion I’ve had all year, this should show how low the risk of transmission outdoors is in general with contact for short periods of time – and even lower after vaccination. Keep the masks with you when you are stationary in a crowd and going inside. “

To understand how low the risk of transmission is outdoors, researchers in Italy used mathematical models to calculate the time it would take a person to get infected outdoors in Milan. They envisioned a bleak scenario in which 10 percent of the population were infected with the coronavirus. Their calculations showed that it takes an average of 31.5 days of continuous outdoor exposure for a person avoiding the crowds to inhale a dose of virus sufficient to transmit an infection.

“The result is that this risk in the outside air is negligible if crowds and direct human contact are avoided,” said Daniele Contini, lead author of the study and aerosol scientist at the Institute of Atmospheric Sciences and Climate in Lecce, Italy.

Even with more infectious virus variants floating around, the physics of virus transmission in the open air has not changed and the risk of infection in the open air is still low, according to virus experts. Pay attention to the infection rates in your community. As the number of cases increases, the risk of encountering an infected person increases.

Dr. Cevik notes that outdoor masking debates and articles with photos of crowded beaches during the pandemic have created the false impression that parks and beaches are unsafe and distracted by the much higher risks of indoor transmission. Often times, it is the indoor activities associated with outdoor fun – like traveling without a mask on a subway or a car for hiking, or visiting a pub after a beach break – that pose the greatest risk. “People grill outside, but then they spend time inside chatting in the kitchen,” said Dr. Cevik.

The more people vaccinated, the easier it becomes to make decisions about whether to be maskless outdoors. While no vaccine offers 100 percent protection, the breakthrough infection rate has been exceptionally low. The U.S. Centers for Disease Control and Prevention recently reported just 5,800 breakthrough infection cases in 75 million people vaccinated. And the CDC has said vaccinated friends and family members can safely spend time together without masks.

But it’s okay to keep wearing your mask outdoors if you prefer. After a year of pandemic precautions, people can find it difficult to adjust to less restrictive behaviors. Sarit A. Golub, professor of psychology at Hunter College, City University of New York, said it was important that both the media and public health officials share the reasons people can change certain behaviors, such as masking outdoors.

“In the months ahead, ‘normal life’ will be safer, but I worry that some people may not be willing or able to relax pandemic restrictions in any meaningful way,” said Dr. Golub. “I worry that people have internalized the fear messages without understanding the reasons for certain behavioral recommendations, and therefore the reasons they can be changed if circumstances change.”

Gregg Gonsalves, assistant professor of epidemiology at the Yale School of Public Health, said he recently dated a group of parents, including many vaccinated doctors, who met in a New Haven park to mark a child’s first birthday to celebrate. “We’re all just standing around, all masked, and then we’d be like, ‘When can we be outside and take our masks off?'” Said Dr. Gonsalves. “If people are vaccinated and you’re outdoors, masks are probably unnecessary at this point.”

But Dr. Gonsalves said he understands why some people may not be willing to give up their masks outdoors. “Some of that is Covid Hangover,” he said. “We were so traumatized by all of this. I think we need to have a little compassion for the people who are having trouble letting go. “

Illustrations by Eden Weingart

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How Sporting a Masks Can Scale back Allergy Signs

How Wearing a Mask Can Reduce Allergy Symptoms

As we head towards our second pandemic, many of us may itch when we give up our masks. But for the 19.2 million American adults who suffer from seasonal allergies, there’s another reason to keep wearing your mask.

While cloth and medical masks protect us well from virus particles, studies show that masks can also be effective at filtering common allergens that are usually floating around in much larger sizes, making them easier to block. Pine pollen, for example, is about 800 times larger than the coronavirus, said Dr. David Lang, an allergist at the Cleveland Clinic. Even before the pandemic, he advised patients with severe allergies to wear a mask outside, especially during prolonged activities such as gardening or gardening.

Using masks to relieve allergy symptoms can take a bit of “trial and error,” said Dr. Purvi Parikh, an allergist and immunologist at NYU Langone Health. But overall: “If less pollen gets into the nose and mouth, the likelihood of an allergy attack is less,” she said.

Israeli researchers recently examined how much of a difference wearing a mask can make for allergy sufferers with mild, moderate, and severe symptoms. Using data from 215 nurses who used surgical masks or N95 masks over a two-week period, they found that nearly 40 percent of 44 nurses with severe allergy symptoms had fewer sneezes, runny noses, and nasal congestion when they had surgery wore or N95 mask. Among the 91 nurses with moderate symptoms, 30 percent improved when they wore a surgical mask; that rose to 40 percent when they wore an N95. Among the 80 nurses who started the study with mild symptoms, 43 nurses, or about 54 percent, felt their symptoms improved when they wore a surgical or N95 mask, said Dr. Amiel Dror, a physician-scientist at Galilee Medical Center and Bar-Ilan Medical School, Azrieli University and lead author of the study.

The use of masks was also more effective in nurses with seasonal allergies than in nurses with year-round symptoms. Wearing a mask didn’t solve the problem of itchy eyes, according to the September report published in the Journal of Allergy and Clinical Immunology.

Although the results suggest that wearing a mask may relieve allergy symptoms in some people, the researchers noted that more study is needed. It could be that the nurses had fewer symptoms because when they were not working they stayed at home avoiding the crowds during lockdown and therefore had less exposure to allergens in the environment. The fact that wearing a mask covering the nose and mouth was associated with improvement in nasal symptoms but not eye irritation suggests that masking likely helped reduce many allergy symptoms.

Wearing a mask not only filters out allergens, but also makes the air in our nasal cavities warmer and more humid, said Dr. Dror. “We know that dry and cold air sometimes have the ability to trigger a reaction in the nose,” he said. “This is an added benefit of wearing a mask. With all the bad, you can find something good. “

The protection varies from mask to mask, depending on the fit and, in the case of fabric masks, on the weave of the fabric. And if you don’t always wear a mask, you may still be affected by indoor allergens like dust mites or pollen, which are carried through open windows in spring breezes.

“It can help, but it won’t necessarily eliminate all of your symptoms,” said Dr. Sandra Lin, professor of ear, nose and throat medicine at the Johns Hopkins School of Medicine. “Pretty much everyone wears masks most of the time now, and people are still getting allergy symptoms.”

Here are some more tips to help reduce your symptoms during allergy season.

  • Protect your eyes. Dr. Lang recommends allergy sufferers to wear glasses or sunglasses outdoors to prevent allergens such as tree pollen from making direct contact with the eyes.

  • Wash and change your mask frequently. “The last thing you want is for allergen to get trapped in it,” said Dr. Parikh. She recommends that patients change when they come home and shower before bed to make sure pollen doesn’t stick to their skin and wash reusable masks frequently. The Centers for Disease Control and Prevention recommend washing a cloth mask after each use.

  • Find a mask that won’t irritate your skin. Choosing the right mask for an allergy-prone wearer can also be important. People with sensitive skin may react to dyes in some cloth masks and should use fragrance-free detergents. Or choose a surgical or medical mask that is less irritating to the skin. “My allergy sufferers have very sensitive skin because the same animals that make them sneeze or cough can also irritate their skin,” said Dr. Parikh.

  • Talk to a doctor if your allergy symptoms are severe. “If people continue to have symptoms that interfere with normal activity – if they are absent from work, absent from school, sleep is disturbed at night – see a doctor,” said Dr. Long. “There are other ways we can help. You shouldn’t suffer unnecessarily. “

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How Efficient Is the Masks You’re Carrying? You Might Know Quickly

How Effective Is the Mask You’re Wearing? You May Know Soon

There are currently more than 100,000 different face masks for sale. They come in silk, cotton, and synthetics; with and without filter; over the head and over the ears. They have sparkles and sunflowers; friendly greetings and insults; Cartoon characters and teeny reindeer.

What they don’t have is a label that shows how well they block infectious particles, an omission that has frustrated public health officials during the coronavirus pandemic. These experts find that the effectiveness of different designs varies widely and some particles barely filter out.

“The most basic and basic question is, what is the safest mask and how can I make sure I have it and my family members and children have it?” said Fran Phillips, who resigned from her post as Assistant Secretary of Health of Maryland in August. “It’s so amazing that we’re here right now and don’t have that information.”

This could change soon. A division of the Centers for Disease Control and Prevention is working to develop minimum standards of filter efficiency and labels showing which products meet them for the vast and confusing market for masks and other face coverings.

The National Institute for Safety and Health at Work, a division of the CDC known as NIOSH, tacitly published guidelines drafted next month with an industry standard organization, ASTM International (formerly the American Society for Testing and Materials).

“When you have a standard, you can know what level of protection is being achieved and you can consistently evaluate these products,” said Maryann D’Alessandro, director of the NIOSH National Personal Protective Technology Laboratory.

Since the beginning of the pandemic, there has been hardly any nationwide supervision of masks and other face coverings. Both the Food and Drug Administration and the CDC have some authority over the industry. The FDA, which regulates medical devices, shares authority with NIOSH for monitoring N95 respirators, which are most protective devices on the market. However, most of the masks worn by the public are just pieces of cloth and are not subject to any government oversight.

Sales of masks spiked after the FDA issued an emergency measure in April – when healthcare facilities struggled to secure enough protective gear – that in part said the agency would not take action against companies that sell them to the general public . At the same time, however, the FDA also stated that these products “may or may not meet the liquid barrier or filtration efficiency”. That warning did no harm to the market, and some critics now blame the FDA for the poor quality of many products sold.

“There were many things the FDA could have done to improve the situation, especially after research was released into which masks worked and which didn’t,” said Diana Zuckerman, president of the National Center for Health Research, a nonprofit health policy group. “The FDA could have issued instructions that masks should be attached, at least two layers of fabric, not made of stretchable materials, etc. Instead, there was one free for all.”

The effectiveness of masks “can be between 0 and 80 percent depending on the material composition, number of layers and layer bonding,” said Dale Pfriem, president of Protective Equipment Consulting Services and member of the working group for the development of standards dealing with mask guidelines.

The gold standard for masks is the N95, which is tight and can filter out at least 95 percent of very small particles. But N95 masks are generally reserved for naturopaths and have been in short supply since the outbreak began. Hospitals desperate for more N95 have been driven to a booming black market to keep them secure.

To make up for the shortage, the FDA approved the sale of the KN95, the Chinese equivalent of the American N95, last spring. However, the agency soon discovered fraudulent and counterfeit products and narrowed the range of allowable KN95 imports. Nevertheless, the agency admits that there is still widespread fraud and that countless companies label masks that do not meet FDA standards with “KN95”.

Updated

Apr. 16, 2020, 4:13 pm ET

One step below the N95 in terms of protection are FDA approved surgical masks that must meet certain government standards. The surgical mask style is often copied by companies that sell imitations that do not offer the same level of protection.

And then there’s the Wild West: Millions of masks made of every possible fabric, from individual layers up, as well as headscarves and gaiters, closed loops of fabric that can be worn around the neck and extend over the lower part of the face.

Almost any mask is better than no mask, say public health experts. The CDC has updated its guidelines on masks several times to find that a tightly woven, multi-layered fabric provides better protection than a single-layer or loose-knit mask – both for the wearer and for those who come in with the wearer Contact. However, the agency’s website does not provide clarity on whether masks with filters provide better protection than those without filters, and how synthetic fabrics compare to cotton or other materials.

“There was a critical need for some sort of national program to test and certify masks and communicate with people about how they are used and cared for,” said Linsey Marr, professor of civil and environmental engineering at Virginia Tech and lead expert for viruses in the air.

A working group of federal and industry representatives has proposed high and low filtration requirements that manufacturers and distributors can adopt and list on their labels. The lower standard is a 20 percent filtration barrier and the higher is 50 percent.

These numbers are more protective than they sound. Filtration Efficiency Percentages are based on a product’s efficiency in filtering 0.3 micron particles, which are the most commonly used particulate matter standard for NIOSH testing.

“A 20 percent efficiency at 0.3 micrometers would mean 50 percent efficiency for 1 to 2 micrometers particles and 80 percent efficiency for blocking particles 4 to 5 micrometers or larger in size,” said Dr. Marr. “I think it will be useful.”

According to Dr. Marr, the coronavirus itself is 0.1 micrometers in size, but is transported in aerosols, which can range in size from around 0.5 micrometers upwards.

Jeffrey Stull, a member who helps write the standards, said the group would also rate masks and face covers for “breathability”. The standard project has been a long way.

“It was a very difficult process,” said Stull, president of International Personnel Protection Inc. “We have been trying to find that consensus on what the level of performance should be. We were initially talking about higher levels and they said,” No. “80 percent of the industry can’t stick to it – it won’t do anyone any good.” So we had to compensate. “

Manufacturers who want to ensure that they meet the ASTM standard must first have their products tested by an accredited laboratory. They should also be able to demonstrate that their masks provide adequate adaptation to the general population. Those who comply with the standards can then determine that they meet the ASTM standard for the product or packaging. However, there is no enforcement mechanism.

Daniel Carpenter, Professor of Government at Harvard, described the work of NIOSH in the development of the standard “Regulatory Entrepreneurship”.

It says, ‘Let’s use the tools we have, even if we don’t have formal regulatory tools, “Carpenter said.” It’s an alternative way of regulating. It can have a pretty important regulatory effect because if it does If you do not comply with the standards, you will not receive a seal of approval.

Mr. Pfriem hopes that the standards will prevail. “What we have here is a really good standard,” he said. “Manufacturers will have something to design their products and incorporate into their marketing materials and packaging, and consumers will have a sense of confidence.”

He added, “I can tell you that a lot of what is marketed on eBay and other websites and manufactured, for example, in your neighbor’s garage, cannot meet this standard.”