The horizontal nonhomogeneity of the background wind and pressure fields influences the term of the inertial force in the motion equation and the wind speed at the upper boundary of the PBL.
First, we have to assume that people are equally spread across this chart; meaning some people are mean and ugly, some are ugly and nice, some are good looking and mean, and some are good looking and nice!
So the debate pits economic concerns against health guidelines, and because the disease isn't spread evenly across America, there's no one clear policy that can be applied nationwide.