These KN95 face masks are not NIOSH approved and are intended to be used as a method of source control only. They are not intended to be used as a surgical mask or to provide liquid barrier protection, for use in a clinical setting where the infection risk level through inhalation exposure is high, for antimicrobial or antiviral protection or related uses or uses for infection prevention or reduction or related uses, as a respiratory protective device, or for high risk aerosol-generating procedures.