Adaptation.
Dogs bodies make vitamin C hourly.
They get flu each year, but because they make vit. C their immune system gives them herd immunity.
Adaption to a new virus each year is how humans have survived for a million years.
Those who do not eat fruit or supplement with vitamin C hourly die.
Humans & fruit bats must supplement w vitamin C hourly to get herd immunity & so adapt to CoVid19.
Write-in Paul Kangas 4 President.