Nope..not an engineer or physicist and barely understand the concepts let alone all the equations I Have seen.
I watched Big Bang Theory off and on over the years. Sheldon, the physicist had disdain for his buddy that was an engineer...but these scientific concepts meld together when it comes to masks
My approach is simple for a simple person. Because I am high risk...I wear a face shield visor hat and a mask. Usually not n95 unless going to a Drs office, etc.
I accept that I will probably inhale some of the virus due to the nature of the PPE (gaps) and my own inept handling of the equipment. I have a procedure I follow but I am sure there is cross contamination.
I theorize that part of the issue (and it may be a small part) of why you see such a wide range of reactions by people is because of their viral load.
I also take various precautions when I get home to also lessen the viral load of whatever I got shot up with while out.
Some of the things I do aren’t practical for every day use and would be hard for people to follow.
For example, I am not sure I would want to put PVP Iodine up my nose every day but it’s okay for the few times I go out. This is recommended by some ENT drs and Dentists so I am willing to give it a try
There is just no way no matter what you do that you can fully protect yourself.
If people don’t want to wear a mask they should at least have an understanding of the science when making the decision.
Btw, one article by the infection disease/engineer person indicated said person was not wearing an n95 for daily use. This is back in June when they were hard to come by. She was wearing a lesser mask. Don’t know what she is doing now. She does post on twitter but I dont follow her.
Some populations and occupations are at higher risk. Higher risk = do something now to get that extra 1-2% safety margin.
Ugh. I saw it on an airplane. Made by people with 70 IQs for people with 70 IQs.
Sorry, if people like it, I found it terrible. I think the writers have never met a physicist or engineer.