nCoVid19 Virus is .1 Micron ... N95 & N100 Mask Can Filter To .17 Micron. You Do The Math!

If COVID-19 virus particles are 0.1 micron in size, how is it that an n95 mask that filters 95% of particles 0.3 microns or larger effectively protect someone from infection or from infecting others? 

https://www.reddit.com/r/Coronavirus/comments/f4ih6a/if_covid19_virus_particles_are_01_micron_in_size/

Are N95 Masks Really Effective against the flu?

https://www.envirosafetyproducts.com/resources/dust-masks-whats-the-difference.html

Research Study on the Survival of Coronaviruses in Water and Wastewater

https://www.reddit.com/r/PandemicPreps/comments/f68phu/research_study_on_the_survival_of_coronaviruses/