Dr. Howard Smith Oncall

  https://youtu.be/nMUB4e0lxYk   With CoVid now with us for the foreseeable future, you will need masks that are effective.  Companies peddle all varieties of masks, and I want you to know which are the most effective.   You want a mask capable of filtering out at least 95% of particles 0.3 microns or more in size which is the N95.  Since CoVid is about 0.1 micron in size, even N95 or KN95 masks, the southeast Asian equivalent, aren’t ideal but likely as good as you can get short of a mask with HEPA filters.   You can now buy KN95 masks online, but be certain to buy from a manufacturer approved by the FDA.  I’ve included links to the approved list.   https://www.fda.gov/medical-devices/coronavirus-disease-2019-covid-19-emergency-use-authorizations-medical-devices/personal-protective-equipment-euas Scroll down to Appendix A.   https://smartairfilters.com/en/blog/whats-the-difference-between-n95-and-kn95-masks/   #mask #n95 #kn95