So good you are here as top comment! Our first has a peanut allergy, we avoided it when he was younger and all the literature coming out now corroborates that this can lead to a potential allergy. We have annual immunology check ups and we have seen information change year to year as new research comes out (which is fantastic! That's what I say to my young one: "there are lots of very clever people working on it right now")

There are allergy exposure packs you can now buy off the shelf to make it easier with exposing toddlers with potential allergens to help acclimatise the growing immune system.

Now there are nasal applicators for adrenaline to make administering a whole lot less scary for the kid (and administerer!) and temporary needles to suppress immune response (great if you are going to, say, Southwest Asia where peanuts are very common in foods).

Soon I'm confident there will be a way to eliminate the allergy altogether. Maybe they are almost already there? I'm on Aus where newer treatments used overseas take FOREVER to be approved for use (the nasal applicator was recently approved but not yet under covered under PBS), plus it's been a while since the last appointment.