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The coronavirus disease 2019 (COVID-19) pandemic caused by SARS-CoV-2 has resulted in critical personal protective equipment (PPE) shortages, especially filtering facepiece respirators (FFRs, also known as N95 respirators) and medical masks (MMs). N95 FFRs are respiratory protective devices which are designed to filter at least 95% of airborne particles. A MM is a medical device covering the mouth, nose and chin ensuring a barrier that limits exposure of an infective agent between healthcare personnel (HCP) and the patient. MMs are used by HCPs to prevent large respiratory droplets and bodily fluid splashes from reaching the mouth and the nose of the wearer and help reduce and/or control at the source the spread of large respiratory droplets from the person wearing the mask. MMs include surgical and procedure masks and are not considered respiratory protective devices. N95 FFRs tightly fit the face while MMs are designed as loose-fitting devices.