Wow, an antivaxxer actually got something close to being kinda right! So close but so far. Allergies are caused by immune system reactions that were originally used against parasites that we as a species eliminated through sanitation. Those reactions are still there and sometimes a random thing can trigger them and really f*ck up your body considering that there isn't actually a threat to eliminate.
But you had to ruin it with the peanut allergy take