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'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: https://royalsocietypublishing.org/doi/full/10.1098/rsif.2013.0560#d3e1463
Size distribution of coughed particles/droplets:

https://www.ncbi.nlm.nih.gov/pubmed/18158720 
So, you can relax about this "my mask only filters down to .03 microns and a COVID-19 virus is smaller than that"
For more information, please re-read.
You can follow @DanKaszeta.
Tip: mention @twtextapp on a Twitter thread with the keyword “unroll” to get a link to it.

Latest Threads Unrolled:
There are a lot of misconceptions about the Turkish diaspora in Germany. Since i just finished writing an essay about this topic I thought it's time to give other people
Read more
Las mejores calculadoras online en 2020A thread http://totumat.com/2020/11/26/las-mejores-calculadoras-online-en-2020/ Cuando se estudian asignaturas que requieren de cálculos complicados, nada mejor que contar con una buena calculadora.
Read more
Mitigating #ClimateChange is as much about taking up new techs as about leaving others behindMost studies focus on #coal's global downfall but another #energy tech decline is loomingRead my new
Read more