August 13, 2020

Which Type of Face Mask Is Most Effective Against COVID-19?

Janelle Ringer, Loma Linda University Health News

Face masks are a simple way to help decrease coronavirus transmission and save lives.

According to the United States Centers for Disease Control and Prevention (CDC), wearing a face mask in public places has been shown to reduce the spread of COVID-19, because those who are pre-symptomatic can spread the virus before showing symptoms. Some masks are more effective than others, however.

Adrian Cotton, chief of medical operations at Loma Linda University Health (LLUH), breaks down how different types of masks protect you and how they are meant to be used.

Fabric/Cloth Masks

Fabric or cloth masks trap droplets released when the person wearing the mask sneezes, coughs, or talks. They reduce the spread of viruses, are easy to purchase or make, and can be washed and worn again. It’s also important for the wearer to avoid touching their masks, and if they do, sanitize or wash their hands after. Additionally, if a cloth or fabric mask becomes wet or dirty, it’s important to switch to a clean, dry one. These masks should not be shared.

Surgical Masks

Surgical masks — also called medical masks — are loose fitting and disposable. They protect the nose and mouth from coming into contact with droplets that could carry germs. They are made to protect you from sprays or splashes that could enter the nose or mouth. These masks can also filter out large particles in the air and make sure droplets from the wearer aren’t spread. These masks are for single use only.

N95 Masks

N95 masks provide a higher degree of protection than a surgical mask or cloth mask because they can filter out both large and small particles when the wearer breathes. They are called N95 masks because they’re designed to block 95 percent of particles or liquids that may come in contact with your face. However, these masks are not for general public use and should be reserved for health-care workers and other medical first responders. They’re also incompatible with children or people with facial hair. Health-care providers are fit-tested for these masks. And like surgical masks, they’re intended for single use only, though researchers are examining effective ways to clean these masks.

Face Masks With Valves

These masks may make it easier to breathe out, but as the wearer is doing so, they’re also exhaling their germs into the air around them. Increasingly, more medical facilities around the country have banned the use of masks with valves. They do a good job of protecting the wearer, but because of the one-way valves, they don’t offer much protection to the people around the wearer. If the wearer is contagious, either knowingly or unknowingly, they could still be spreading the virus to others. Since the main reason to wear a mask is to protect others, a simpler mask with a filter may be a better choice.

The original version of this story was posted on the Loma Linda University Health news site.