Conventional surgical masks do not provide sufficient protection in an operating room with a risk of aerosols rich in viral droplets. The N95 respirator masks regulated by the US National Institute for Occupational Safety and Health (NIOSH) are not EC-approved. The FFP2 and FFP3 filtering facepiece masks are more efficient as regards the filtration of aerosols (of saline solution or paraffin oils), with an efficiency of 94% for FFP2 and 99% for FFP3. FFP2 masks meet the filter efficiency criteria of the NIOSH [21]. To be effective, these masks must, however, be used correctly and be properly fitted.