Evolution isn't survival of the fittest. It's mutations which survive their environments and get passed on, and new species eventually emerge. Natural selection is ONE mechanism of evolution.So let me get this straight? You come upon understanding that the virus will mutate and the the fittest will survive. That's called Evolution bro and it's been around forever.
Survival of the fittest is a loose term for adaptation, which is ONE mechanism of natural selection.
It's also an idea used to justify a lot of atrocities and not giving a sh*t about others.