If there now is a "standard test" for barrier materials, why the need for two more?
Nathan L
NL
Belkin
D018562:Disease Transmission, Infectious / Q000517:prevention & control*; D006801:Humans; D008422:Materials Testing / Q000592:standards*; D011481:Protective Clothing / Q000592:standards*; D013784:Textiles / Q000592:standards*