A cloth mask does not sufficiently filter out the air particles encasing the virus that come into the wearer, but it reduces the number of air particles going out. The 95 in the name “N95” denotes the percentage of air particles that the multiple layers of synthetic material are able to filter out thanks to an electrocharged layer of fabric capable of attracting and trapping fine droplets. Medical masks such as N95s, KN95s (certified in China), and KN94s (certified in South Korea) are best at preventing the spread of most airborne pathogens. Respirators also fit tighter on the face, eliminating air pockets through which air particles can seep.
Emphasis added. I hate when idiot liberal arts majors try to write about science. Can somebody ask Cassidy Morrison to explain to us what an "air particle" is and how they transmit the SARS-CoV-2 virus?
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