Face Masks Fitted With Valves Are Not Better Than N95 Masks Against Covid-19 Spreads

Comments · 26 Views

A new study by Florida Atlantic University reveals the ineffectiveness and inefficiency of face shields in protecting against the spread of COVID-19.

A new study by Florida Atlantic University reveals the ineffectiveness and inefficiency of face shields in protecting against the spread of COVID-19.

Researchers used a mixture of water and glycerin to simulate a cough and/ or sneeze in a mannequin's nose and mouth. To test the effectiveness of both the mask and exhalation valve in stopping droplets from spreading, simulations were conducted under two conditions. Droplets could be seen coming out of the visor in the version with the face shield.

One of the study's researchers stated that the larger droplets will be stopped. However, the smaller droplets can follow the air streams very well and flow around the visor easily before being released into the environment. "Depending on the air conditioning flow and other factors, they can be distributed throughout the room.

Researchers from a 2014 study, "Efficacy of Cough Aerosol Droplets from a Cough Simulator Face Shields Against Cough Aerosol Droplets," published in the Journal of Occupational and Environmental Hygiene, stated that face shields cannot be substituted for respiratory protection.

The 2014 Florida Atlantic University study also used plastic face shields to simulate the effects of cough drops. It showed that the protection of the wearer was 96% and the effectiveness of protecting others from the droplets.

According to the Centers for Disease Control and Prevention, face shields are not recommended as an alternative to face coverings. To see what happens to these tiny drops when you use a mask,

A mask with an exhalation valve proved to be effective in protecting the wearer. However, it was not as protective as face shields. These masks with exhalation valves are not intended to be used as source control. Consider if you are working in a dusty environment at home. While you don't want any dust to get inhaled, you don't care much about the air you exhale. This mask is ideal for those situations, but it's not recommended to be used in medical settings or during a current pandemic.

What types of masks work well to stop particles from traveling?

Duke University scientists tested 14 types, including surgical, cotton, and N95 mask. N95 and KN95 masks have a seal that protects the wearer as well as those around them. Also, surgical masks proved to be very effective.

The study's main purpose was to show that a shield or mask without a valve is not effective. It is safer to use a mask made from good quality materials. They are very effective.

Comments