If Masks do work,why not close concessions at Sporting events and allow fans to attend with them on?

Again look up Avagadro's formula for Gram Atomic Weights of Carbon Atoms.
Convert that to a Mole,( Molecular Composition), like a virus, and compare that with what the masks, even the best ones, are able to filter.
hint; 6.023 X 10 to the 23rd power is the gram atomic weight multiplier X a carbon atoms weight.
That is .000000000000000000000006023 X Carbon atom 's weight. Add about 100,000,000,000 atoms and your mask, any mask including the M95, still comes up about 16 0's short of stopping any virus.
It's all a big lie.