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FaceShields vs Face Masks
We all fully understand the importance of wearing face masks to protect others from potentially deadly infection when we leave the house. But face masks by application can be hot, and irritable to the skin, fog glasses, plus make it difficult to breathe and furthermore it creates a world without smiles.

Wearing face masks can be difficult for people who have hearing difficulties to communicate when mouths their mouths covered, muffling voices and hiding facial expressions.

Clear plastic face shields, most frequently used in health care settings, can be a better option?

Some health experts say faceshields appear to be very effective at preventing infection — maybe even more effective than masks — for someone going about regular daily activities and not in a high-risk health care setting.
For the latest coronavirus news and advice go to AARP.org/coronavirus.

Amesh Adalja, M.D., a pandemic preparedness expert at the Johns Hopkins Center for Health Security, says, “There’s a lot of at least biological possibility to suspect that [shields] are definitely better than homemade face masks, and maybe even better than other types of masks as well, because they not only prevent you from spreading it … [and] because it also covers your eyes, it provides more protection to the mucus membranes of your face where you might be getting infected.”

James Cherry, M.D., a distinguished research professor and infectious disease expert at the David Geffen School of Medicine at UCLA, says that while experts aren’t yet sure about how vulnerable our eyes are to infection from this coronavirus, “With many viruses, the eyes are important.” He points to measles and adenoviruses as examples of viruses that are known to infect people through their eyes.

DIY face shield tips
There are many online videos showing how to make your own shield in a few minutes, with different variations: a Canadian DIYer uses plastic binding covers you find at office supply stores; others use plastic bottles. (Note that these are not medical-grade or approved by any official health agency.)

Another benefit, says Adalja: With a mask, you may find yourself constantly adjusting it and therefore touching your face and possibly transferring the virus from your hands, but wearing a shield “doesn’t really put you in a position where you’re touching your face so much, because it’s not as cumbersome to wear.”

And finally, Adalja adds, “If you walk down the sidewalk, you can find lots of masks that are just discarded there, which are an infection control risk for other people. Whereas a face shield is something that people can just clean themselves and reuse.”

A recent opinion piece in JAMA by Eli Perencevich, M.D., a professor of internal medicine and epidemiology at the University of Iowa Carver College of Medicine, and two of his colleagues pointed to such benefits of shields for infection prevention, and noted that “face shields appear to significantly reduce the amount of inhalation exposure to influenza virus, another droplet-spread respiratory virus. In a simulation study, face shields were shown to reduce immediate viral exposure by 96 percent when worn by a simulated health care worker within 18 inches of a cough.” In an April 19 tweet Perencevich wrote, “Biggest benefit of face shields would be inside crowded office situations where air exchanges aren’t ideal.”

Another benefit? With warmer weather, many may also find a face shield attached to a headband or cap cooler to wear than a cloth mask.

Some members of the public are taking such arguments to heart — choosing shields especially for their ability to keep the entire face visible.

Lauren Lek, head of school at Academy of Our Lady of Peace, in San Diego, plans to have her 750 returning faculty and students wear face shields at school rather than masks this August. “Safety and health for our community is a priority for us in reopening,” she says. “As soon as we saw from the CDC [Centers for Disease Control and Prevention] and our local public health office that face shields would be an acceptable alternative to face masks, we knew this was a direction we wanted to move in.”

Noting that face-to-face interaction is key to the education her school provides, Lek adds that face shields are better than masks for students with learning differences, including autism spectrum disorders (ASDs), because they allow for full visibility of facial expressions that can help them read and understand social cues.

The school has purchased more than 10 different types of face shields to test before classes restart, Lek says, with each posing challenges in terms of clarity, fogging, ease of cleaning and reuse. They also shouldn’t cause headaches when worn 10 hours a day. “With each product we try, we are getting closer to the best option for the start of school in August.”

Double protection?
Some people are choosing both infection-prevention methods. Hope Taitz, an investment manager in New York City who travels frequently for business, began wearing a face mask and face shield together when she saw the pandemic starting to unfold while logging 100,000 miles of travel in January and February. She said one of the best things she saw traveling in Asia were deep bubble umbrellas that can cover you from head to midsection.

You’re likely to find only health care workers wearing both a shield and a mask simultaneously, however. “I don’t wear the shield alone,” says Anne Mary Orr, a dentist in private practice in Broken Bow, Oklahoma. “At work, the whole point of the shield is to keep particulate matter off the mask. The N95 mask I wear under it helps filter breathing the virus. Our greatest risk is to inhale an aerosol at work, more so than focusing on the droplets.”

Kristi Carnahan, a registered nurse in the Emergency Department at Stanford Hospital in Palo Alto, California, says she also wears a mask beneath her plastic face shield to provide more “protection against anything in the air getting into your mouth or nose as you breathe.”

That reasoning may make sense in a health care setting, says Adalja, but “I don’t think you get much added benefit to wearing a mask if you’ve already got a face shield on, for the average person.” The odds of the viral particles floating upwards under your shield are a long shot for most of us, he adds: “Someone would have to stand underneath you and sneeze up into you. It would be an odd circumstance that would cause that.”

Keeping the mouth visible
Carnahan acknowledges that masks are difficult for people like herself who have hearing difficulties. She says she finds herself asking colleagues to repeat themselves frequently when she cannot see their mouths. “It is a reality for many who rely on lip reading or ASL [American Sign Language] that masks make communicating much harder,” she notes, “especially because facial expressions are an integral part of American Sign Language.”

While it doesn’t explicitly recommend the use of face shields, The American Speech-Language-Hearing Association (ASHA) recently sent a letter to CDC Director Robert Redfield asking the agency to emphasize the need for clear face masks and other communication aids in health care settings to help people with hearing and other communication disorders. “If a patient doesn’t hear/understand properly, there could be serious consequences like adverse medical events,” says ASHA spokesperson Francine Pierson. Brigham and Women’s Hospital in Boston, for one, has begun using special masks with transparent cutouts making the mouth visible for health care workers speaking to patients with hearing loss.

Whatever you decide to wear to prevent infection when you’re out and about, keep in mind that staying safe from COVID-19 means putting in place multiple safeguards, including thorough handwashing.

The most important safety measure, though, is social distancing, Cherry says. “The virus is in these droplets, and they don’t go very far — they fall to the ground. So that’s why [staying] 6 feet away from others is the most important thing that we can all do.”

Where to buy shields

Shields come attached to hats or attach to glasses or headbands. You can buy them online, often for less than $20, at sites such as Gearbest, Pro-Tex and Amazon. Some manufacturers, like RealShield by Racing Optics Inc., are making face shields with UV coatings.

“For optimal protection,” Perencevich and his colleagues assert in their JAMA article, “the shield should extend below the chin anteriorly, to the ears laterally, and there should be no exposed gap between the forehead and the shield’s headpiece.”