Our immune systems were evolving 100 thousand years ago, and they still are now.
If we weren't able to handle new diseases, everyone would have died from covid, not some percent of a percent. Our immune systems are very very capable for handling pathogens
So does Guns, Germs, and Steel and Sapiens, and Dawn of Everything and so does 1491 - and for all they do touch on disease what I've said comports with them.
Our immune systems were evolving 100 thousand years ago, and they still are now.
If we weren't able to handle new diseases, everyone would have died from covid, not some percent of a percent. Our immune systems are very very capable for handling pathogens