The Athens Voice — November 24, 2021
“They say, ‘Follow the science.’ Well, let’s have a little science: N95 masks trap particles down to .3 microns, or 300 nanometers. (Source: https://multimedia.3m.com/mws/media/323208O/n95-particulate-respirators-1860-1860s-1870-faqs.pdf). There is some discussion of the
Source: athensnews.com