Face masks ‘inadequate’ and should be swapped for respirators, WHO is advised

Experts are urging guideline changes on what health professionals should wear to protect against flu-like illnesses including Covid ...
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Here's what happens to oxygen levels when you wear a mask

DUBLIN, Ireland -- A doctor based in Dublin, Ireland, has debunked the idea that a face mask lowers oxygen levels. In fact, he's shown that even wearing several has no effect. This video shows Maitiu ...