> whether masks with holes orders of magnitude larger than the airborne virus particles they are supposed to stop are effective
N95 masks work due to a dipole charge, not necessarily because of the mechanical filtration size.
N95 masks work due to a dipole charge, not necessarily because of the mechanical filtration size.
> In both respirators, large decreases in the dipole charge density were observed after several heat treatments. However, there was no significant drop in filtration efficiency because multiple parameters (i.e., mechanical filtration) were involved in the filtration performance.