If a picture is worth a thousand words, a graphic display of how do the masks could show (once again) why its use is essential to stop the contagion of covid-19. A new study published by the American Institute of Physics tests the filtering ability of different types of masks.
From the most common (disposable surgical ones) to the most sophisticated (the N95)through the increasingly popular protective screens and exhalation valve masks. The conclusion? That the key is in bet on the masks that filter the most and best. And in using them well, of course.