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Covid-19

Why you should use protective mask in public

w3 layers mask

Standards for MASK

Class[5]Filter penetration limit (at 95 L/min air flow)Inward leakageTypical elastic band
FFP1Filters at least 80% of airborne particles<22%Yellow
FFP2Filters at least 94% of airborne particles<8%Blue or White
FFP3Filters at least 99% of airborne particles<2%Red

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