With material from dpa
Coronavirus: How masks affect breathing
2020-10-02T17:47:41.593Z
Can wearing everyday masks lead to insufficient oxygen in the blood? US researchers have responded to rumors with a study.
Now you can see non-English news...
2020-10-02T17:47:41.593Z
Can wearing everyday masks lead to insufficient oxygen in the blood? US researchers have responded to rumors with a study.
With material from dpa
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