Fact check: Will masks lower the oxygen level, raise the carbon dioxide in your blood? – Boston 25 News

Fact check: Will masks lower the oxygen level, raise the carbon dioxide in your blood? – Boston 25 News

While they are annoying to most of us, there are some who believe they are more than that.
Recently, a meme posted on Facebook, which has since been taken down, and other social media sites claimed …
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