Masks will prevent 100% of cases
It really is a very high level “wild assed guess.”
In order to accurately predict this you have to ask if you are eldery, sickly, and live in a hot spot. In THOSE cases the chances of getting sick are higher.
If you are not elderly, in decent shape, and don’t go hanging out with hordes of people...you should be OK. And even if you get it, you would be very unlikely to go to the hospital or die.
I did some standard statistics in the past for quality control—and I am stunned at the people playing “Statistician” these days. They state things as if they are facts, when in reality they are playing pretty loose with the numbers.