When the Europeans travelled to the New World and brought the diseases that wiped out so many Native Americans, why didn’t the local diseases have the same impact on them?

Question

Were the endemic diseases just less severe?

In: Other

Answer 1

The new world was isolated from the rest of the world so people there never developed immunities to the many diseases that circulated in the old world.

Plus new world folks didn’t domesticate as hard as old world, so disease didn’t spread through animals.

Basically, they were too clean