Author: admin


Coronaviruses are large, roughly spherical particles with unique surface projections. Their size is highly variable and generally is an average diameter of 120 nm (0.125 microns); the range is 0.06 microns to .14 microns. The total molecular weight is on average 40,000 kDa. The N95 mask filters down to 0.3 microns. So, N95 masks block […]