Allergy refers to a hypersensitivity reaction induced by the immune mechanism. Allergy is a disease of civilization. Some will subside quickly and no trace will be found again. Some will relapse, and some will be fatal.
Allergy, when a person encounters an allergen,
Does it come and go quickly, or is it stubborn and won't go away? Should I hold back or look for pills?
Do you know about allergies? What kind of allergies does your love have?