Face masks. Technical, technological and functional characteristics and hygienic-sanitary aspects related to the use of filtering mask in the community
INTRODUCTION: The health emergency caused by the spread of SARS-COV-2 virus has required the adoption of passive measures against contagion, such as social distancing. The use of filtering masks, of the different types available on the market, such as surgical and facial filtering masks (FFP1, FFP2 and FFP3), is also recommended.