• Sat. Dec 5th, 2020

N95 masks with exhalation valves cannot stop the spread of coronavirus

Nov 11, 2020 ,
N95 masks with exhalation valves cannot stop the spread of coronavirus

(Natural News) A new study from the National Institute of Standards and Technology (NIST) is warning the public against using N95 face masks that have built-in exhalation valves, as these allow unfiltered air to escape. This makes these kinds of masks useless at preventing the wearer of the mask from spreading the Wuhan coronavirus (COVID-19) to others.

NIST research engineer Matthew Staymates created two videos showing how air and exhaled droplets escape through N95 masks with and without the exhalation valves.

“When you compare the videos side-by-side, the difference is striking,” said Staymates. “These videos show how the valves allow air to leave the mask without filtering it, which defeats the purpose of the mask.”

Face masks that have valves built in them have become very popular since the start of the pandemic because they allow the wearer to breathe a lot easier, which increases their comfort.

However, these kinds of masks are not designed to prevent the spread of disease outbreaks. Rather, they only filter inbound particulates. This makes them popular for people who work in construction who don’t want to breathe in large dust particles and for hospital workers who want to avoid getting infected by sick patients.

What valved masks are unable to do is prevent the wearer from spreading a virus they already have.

“I don’t wear a mask to protect myself,” said Staymates. “I wear it to protect my neighbor, because I might be asymptomatic and spread the virus without even knowing it. But if I’m wearing a mask with a valve on it, I’m not helping.” (Related: CDC director says face masks “more guaranteed” to protect against coronavirus than any vaccine.)

Researcher used flow visualization techniques to show how air travels through valved masks

 

Source: Study: N95 masks with exhalation valves cannot stop the spread of coronavirus – NaturalNews.com

 

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