Why do so many Northern Americans have so many allergies?

Question

I live in Eastern Europe and not one singular person I know has allergies.

Americans seems to have a sensibility to everything, gluten, peanuts, all types of foods and substances.

Why is that?

In: 1

Answer 1

Sensitivities are different than allergies and cause different reactions.

The eli5 answer is that medical science does not know yet, but Australia and the UK have very high rates of allergies as well compared to other countries that consume a lot of peanuts, like Israel.