'Will masks expire?' Information on mask packaging machines

Masks have become a necessity for anti-epidemic, but many people have the same question - will masks expire? Can the masks left over from the SARS period six years ago be taken out and reused? According to doctors, masks do not have an expiry date, and as long as they are unused and uncontaminated, even those purchased since SARS can still be used. 'The public should choose and buy a mask with three layers of antibacterial material, because its fibers are denser, which can successfully prevent the spread of droplets. Some single-layer material masks with beautiful patterns on the market are not effective.' As for the preservation of masks The method is to just seal it with a bag or special box and store it in a cool place. 'But you must remember that masks should be thrown away after one use. This is not an environmental issue, but used masks are contaminated and should not be used again.'