A healthy person is one who dies immediately following taking a breath of fresh air. How can he be healthy and die from
that? Because fresh air is so full of toxic chemicals, that a truly healthy persons's immune system goes into immediate overdrive to the extent that it kills him.
We are so lucky that our polluted, diseased, barely-active immune systems are so weak, that unhealthy as we are, they let us live for a while, in all the pollution around us.