What's the best type of mask for COVID-19 protection? Scientists investigate | Inquirer Technology
Close  

What’s the best type of mask for COVID-19 protection? Scientists investigate

/ 05:54 PM December 15, 2020
face mask

What type of mask is best for halting the spread of the coronavirus? Image: Lepro/IStock.com

In partnership with the U.S. Environmental Protection Agency, scientists from the North Carolina School of Medicine studied the levels of protection offered by several types of face mask, from medical masks to consumer-grade masks and improvised face coverings.

They assessed the protection that each mask offers to its wearer when exposed to others who may be infected. To achieve this, they used a method based on the Occupational Safety and Health Administration (OSHA) Fit Test to determine the fitted filtration efficiency of the masks.

ADVERTISEMENT

In total, 12 types of facial protection were tested, worn by an adult male who made a series of repeated movements of the torso, head and facial muscles.

Published in the journal, JAMA Internal Medicine, the research reveals that improvised masks can prove effective, so long as they are properly fitted and worn. Moreover, the researchers explain that unmodified medical procedure masks with ear loops — commonly known as surgical masks — offer 38.5% filtration efficiency. However, this can be improved to 60.3% when the ear loops are knotted in a specific way to tighten the fit, or to 80% by adding a layer of nylon.

FEATURED STORIES

As for consumer-grade masks, it was the “two-layer woven nylon mask, with ear loops and nose bridge, washed, no insert” which came out on top (79%), closely followed by the “two-layer woven nylon mask, with ear loops and nose bridge, and one non-woven insert” (74.4%). Note that a cotton bandana folded “bandit” style proved 49% effective, while a three-layer woven cotton mask with ear loops was the least effective choice (26.5%).

As for medical masks, the 3M 9210 NIOSH-approved N95 respirator mask proved most effective (98%), while a surgical mask with ties offered 71.4%, effectiveness. A surgical mask with ear loops was 38.5% effective, unless its loops were tied and corners tucked in (60.3%).

“While modifications to surgical masks can enhance the filtering capabilities and reduce inhalation of airborne particles by improving the fit of the mask, we demonstrated that the fitted filtration efficiencies of many consumer-grade masks were nearly equivalent to or better than surgical masks,” said co-first author Phillip Clapp, PhD, an inhalation toxicologist and assistant professor of pediatrics at the UNC School of Medicine.

As well as informing consumers about the effectiveness of the various types of face masks on offer, and the best ways of wearing them, the findings could also help contribute to designing the “ultimate” face mask to help halt the spread of the virus. NVG

RELATED STORIES:

What we know about COVID-19 vaccines and side effects

Can surgical masks be reused?

For more news about the novel coronavirus click here.
What you need to know about Coronavirus.
For more information on COVID-19, call the DOH Hotline: (02) 86517800 local 1149/1150.

The Inquirer Foundation supports our healthcare frontliners and is still accepting cash donations to be deposited at Banco de Oro (BDO) current account #007960018860 or donate through PayMaya using this link .

TOPICS: coronavirus, COVID-19, face mask, N95 mask, surgical mask
Read Next
Don't miss out on the latest news and information.

Subscribe to INQUIRER PLUS to get access to The Philippine Daily Inquirer & other 70+ titles, share up to 5 gadgets, listen to the news, download as early as 4am & share articles on social media. Call 896 6000.

For feedback, complaints, or inquiries, contact us.

Subscribe to our technology news

By providing an email address. I agree to the Terms of Use and
acknowledge that I have read the Privacy Policy.



© Copyright 1997-2021 INQUIRER.net | All Rights Reserved

We use cookies to ensure you get the best experience on our website. By continuing, you are agreeing to our use of cookies. To find out more, please click this link.