I know from a beekeeper that raw honey taken daily is an old German folk medicine for allergies. You are getting local pollen in a daily dose. Vinegar is made with molds? So, perhaps it does the same thing for mold allergies. So, my guess is a folk medicine treatment for allergies.
“Out of every one hundred men, ten shouldn't even be there, eighty are just targets, nine are the real fighters, and we are lucky to have them, for they make the battle. Ah, but the one, one is a warrior, and he will bring the others back.”Heraclitus