English, asked by dhruv8597, 5 months ago

How does mask works ?

Answers

Answered by AujlaSaab09
5

Explanation:

These one-way valves close when the wearer breathes in, but open when the wearer breathes out, allowing unfiltered air and droplets to escape. Chin-Hong said that anyone wearing a valved mask would need to wear a surgical or cloth mask over it.......

Similar questions