If you're into an historical perspective of disease, this is a pretty good book.
This is really going to sadden them if it continues.
Smallpox died in the same way - the more virulent smallpox was replaced by the much weaker variola minora, which then was eradicated by hygene and increasing health standards.
Hopefully this omicron variant signals a very weakened COVID that will eventually disappear or remain somewhat impotent.
If you're into an historical perspective of disease, this is a pretty good book.