"Author Details Denis G. Rancourt
Denis G. Rancourt was a tenured and full professor at the University of Ottawa in Canada. He was trained as a physicist and practiced physics, Earth sciences, and environmental science, areas in which he was funded by a national agency and ran an internationally recognized laboratory. …
https://www.veteranstodayarchives.com/author/rancourt/
He is a physicist, not a life scientist. He has no scientific expertise in the behavior of viruses. Some of the search results that came up when I searched his name lead me to be highly skeptical of anything he might have to say about Covid-19.
There is a lot more to the behavior of respiratory viruses than just the size of the virus. Viruses are packed into tiny droplets, and those will stick to the mask material.
you are a self proclaimed scientist with no clinical experience with viruses. pot/kettle. But then you only like your own made up data and calculations anyway