MASKS | Does wearing a mask lower oxygen or increase carbon dioxide levels in the blood?
There have been a number of erroneous social media posts claiming that wearing masks lowers oxygen and increases carbon dioxide levels in the blood. In fact, all masks provide adequate airflow, just like oxygen can get in, carbon dioxide can safely get out.
See more information on the website of the BBC, FORBES, the LA Times, MayoClinic, van Der Bilt University, Healthline.com and there are many more reports.
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