These masks should not be used (1) in any surgical setting or where significant exposure to liquid, bodily or other hazardous fluids, may be expected; (2) in a clinical setting where the infection risk level through inhalation exposure is high; or (3) in the presence of a high intensity heat source or flammable gas. For healthcare professional use, intent is to be used as an additional line of protection on top of a FDA and medical grade mask such as the N95. My Snickey makes no warranties, either express or implied, that the mask prevents infection or the transmission of viruses or diseases.