Medical mask (also surgical mask) is a medical device that covers the wearer's mouth and nose with a filter, which protects against inhalation of liquid aerosols containing bacteria (the degree of protection depends on the quality of the filter), as well as large droplets containing them, but does not protect against solid aerosols.
It should also be borne in mind that a medical mask leaves the wearer's conjunctiva (eyes) unprotected from dangerous aerosols, so the mask is primarily designed to protect people around the wearer, as it prevents the aerosol from spreading in the opposite direction as well.
The difference between a medical mask and a respirator is the inability of a medical mask, unlike a respirator, to block small particles of solid aerosols.
(Particle size filtered by respirator may vary by model).
Also in the absence of a valve to facilitate exhalation and a loose fit to the shape of the face.
A modern mask usually consists of a filtering layer, which is placed...
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