With regards to face masks, he said that they are still mandatory in medical facilities, mosques and public transportation, as well as for food service providers, the injured and suspected…
A surgical mask prevented 59 per cent of respiratory aerosols from a cough, whereas a three-layer cotton mask blocked 51 per cent, and a N95 mask blocked up to 95…
To test the fitted filtration efficiency (FFE) of a range of masks, the researchers worked with James Samet and colleagues in the USEPA Human Studies Facility on the campus of…
