you're a waste of time, in just about everything you do on here.
More: any covering is beneficial.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3004550/
Experimental results showed that when droplets spread onto a person face-to-face over short distances, 92.3% to 99.5% of droplets were blocked by the front surface of the facemask, whereas only 0.5% to 7.7% of droplets reached the back of the facemask. Both facemasks A and B had near or over 99% protection efficiency, compared with that of 95.5% to 97% of surgical facemasks. Using the same filters as normal surgical masks, facemasks A and B provided more effective respiratory protection against communicable respiratory infections such as influenza and SARS by the location of the breathing pathway to the back of the facemasks.
Edited by MrBlueSky at 13:33:38 on 04/30/20