evidence: Another issue relevant to preventing transmission through air is to make sure that a draft set of recommendations cannot be misread to suggest equivalency between facemasks and NIOSH Approved respirators, which is not scientifically correct nor the intent of the draft language. Although masks can provide some level of filtration, the level of filtration is not comparable to NIOSH Approved respirators. Respiratory protection remains an important part of personal protective equipment to keep healthcare personnel safe.