Ire nke ihe mkpuchi mkpuchi klaasị KN95 nwere asambodo CE, FDA na ISO ga-echebe onye na-ebu ya site na 95% nke ikuku ikuku nwere dayameta nke 0.3 μm ma ọ bụ karịa. Ọ dakwara na ikuku iku ume N95 America. Ndị WHO na-atụkwa aro ka ndị na-eku ume ume ka ha nwekwuo nchebe megide ọrịa coronavirus.