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Video Presents Flawed Test on Masks, Oxygen Levels

Quick Take

A viral video questions the safety of face masks by using a gas detector to purportedly show that masks result in dangerous oxygen levels for the wearer. But experts — and the company that makes the gas detector — say the video’s test is scientifically flawed.


Full Story 

In a popular video swirling on Facebook, a local official in Pennsylvania casts doubt on the safety of face masks by arguing that a test he performs on camera shows that masks prevent people from breathing “the required oxygen level.”

But the viral video’s test is scientifically flawed and its conclusions wrong, according to multiple experts.

The by Jeff Neff — a and in Sewickley, Pennsylvania — was uploaded June 27 and has racked up more than 11,000 shares and more than 260,000 views. It’s one of many about face masks, which the Centers for Disease Control and Prevention be used to help limit the spread of COVID-19.

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