People worrying about whether or not filtration works, based on the small size of the COVID virus are getting worked up about the size of single viruses.
However, you don& #39;t cough or sneeze or exhale individual virus particles. You expel droplets. Which are much bigger, and relatively easy to filter. Some science on this:
Sneeze particles/droplets: #d3e1463">https://royalsocietypublishing.org/doi/full/10.1098/rsif.2013.0560 #d3e1463">https://royalsocietypublishing.org/doi/full/...
Size distribution of coughed particles/droplets:

https://www.ncbi.nlm.nih.gov/pubmed/18158720 ">https://www.ncbi.nlm.nih.gov/pubmed/18...
So, you can relax about this "my mask only filters down to .03 microns and a COVID-19 virus is smaller than that"
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