Mask Math
The Covid virus size is 0.125 Microns diameter. The cross section area of the virus is 0.012 square microns.
The pore size in an N95 mask is 80 Microns in diameter. The cross section area of the pore is about 5020 square microns.
Dividing the hole size by the virus size, The holes in the mask are 409,600 times bigger than the virus the mask is supposed to trap.
That is the same as trying to catch a golf ball (diameter 1.68 inches) by using a net that has holes 89.6 feet in diameter.
Thanks for the math, which never lies. Now we have some facts to support the anecdote that masks are as effective at keeping out the virus as a chain link fence is at keeping out mosquitos. I do not think it is futile to lob such facts at the fear-enslaved. The truth must be said, over and over. Repetition is the technique the liars use to convince people of their lies, which is the WW2 NAZI model of propaganda. If it can work with obvious lies, it is not unreasonable to think it will work with the truth. The only challenge is prying them away from the fear porn and entertainment propaganda they watch on TV. I have noticed that this has an effect. When their eyes finally re-moisten, they are much more apt to hear what you have to say, and if you don't frighten them with an initial blast, they often come back to have a conversation.