An N95-equal Filtering Facepiece against Particles- (FFP-) 2 masks (1872V®, 3M), a surgical mask (1818 Tir-On®, 3M), and a selfmade mask made from TD Cerise…
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An N95-equal Filtering Facepiece against Particles- (FFP-) 2 masks (1872V®, 3M), a surgical mask (1818 Tir-On®, 3M), and a selfmade mask made from TD Cerise…