Doctors and dentists wear them to mitigate bacterial transmission. They are not PPE. Humans are constantly shedding skin cells and hair follicles that often contain bacteria. Ever work in a Class 100 clean room? Ever do any SEM or AFM imaging? It’s clearly visible. N95’s are designed to mitigate inhalation of particulates greater than 0.3 microns in size when fit tested and worn on a clean shaven face. They do not block mist. Both offer zero protection for the eyes.
Virus was first postulated in the late 1800’s & directly observed in the 1930’s. So… nobody ever found out if masks worked until just now? Absurd.
My training and experience was about 40 years at Lawrence Livermore National Laboratory, Sandia Livermore National Laboratory, Dugway Proving Grounds, Ft Detrick.
i am coauthor on 16 scientific journal papers, have several patents, an R&D 100 Award, was a principle developer on BioWatch Gen 2&3, a principal operative for field deployment, testing and incident response, and worked as a member of the NEST/ARG community. I also worked as a consultant for DHS & Northrop Grumman. I was responsible for personnel safety which included PPE selection and use appropriate to the hazards.
if you still stand by your assessment, that’s fine with me, but you might look up Dunning-Kruger effect.