I'm from Eastern Europe and I don't think I know a single person with allergies. As someone who live outside of it, I can say people are a bit lax with hygiene here except when cooking meat. People can't reconcile you can eat medium rare steak.
Majority of people here in USA I know have some kind of allergy, including people of EE / Slavic descent.
I mean grown up in EE. Literally know nobody with allergies.
So must be environment that they are brought up in?
> I mean grown up in EE. Literally know nobody with allergies.