Unfortunately i'm about 160 years too late - the zest was added by Darwin.
Covid itself is a result of such accelerated selection performed in that Wuhan lab - what is called "gain of function" experiments.
A natural example of a global virus evolution phenomenon was observed in the 2nd wave of Spanish flu - that strain was mostly killing by causing hyper-reaction of immune system and especially in the healthy 20-50 years old individuals, as the strains normally killable by immune system were cleaned in the first wave.
While all that is obvious, if you need a reference to authority there is a virus evolution discussion by a Harward guy:
https://myvoice.opindia.com/2020/04/evolution-of-virulence-a...
"Let’s assume that every propagule generated from the quarantined individuals has a very small chance of escaping isolation and infecting someone. Just because the virulent ones can make more propagules, they have a higher chance of surviving than the milder varieties. This means we are giving a selective advantage to the more virulent ones over the milder ones and as a result virus will evolve for increased virulence."
