Carbon dioxide intoxication and the prolonged use of medical masks

The prolonged use of medical masks does not cause carbon dioxide intoxication nor oxygen deficiency especially when it is properly worn.
The use of medical masks for a prolonged time can be uncomfortable. However, world health organization(WHO) reports that it does not lead to CO2 intoxication nor oxygen deficiency.
While wearing a medical mask, make sure it fits properly and that it is tight enough to allow you to breathe normally.
Do not re-use a disposable mask and always change it as soon as it gets damp.

Medical masks (also known as surgical masks) are flat or pleated; they are affixed to the head with straps or have ear loops.

SOURCE – WHO

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