I know lots of families where the children have allergies. Fish, eggs, gluten, peanuts, someone even claimed an allergy to cumcumber the other day. Never heard of that before. Cucumber! It is just water and chlorophyl.
When I was a kid I cannot remember anyone being allergic to anything. Pretty sure if they were people would have brought it to school and rubbed it on them, because they were mean vicious kids in my school. They would not have passed up the chance to entertain themselves.
My wife, from Russia, doesn't know of anyone who is allergic either. We had a good think the other day and could not think of a single person.
I guess if you are allergic in Russia you just die young and they bury you. But never heard of a death of a young person from an allergy either. Generally speaking medical care there is pretty good. You have to bribe a little, but not very much money. Bribe for our baby was 1000 USD which I thought was pretty good value. Had a private room, a highly qualified doctor in delivery and all the trimmings.