While many historians have labelled the conflict a draw, we're not sure how repelling a foreign invader and then burning its national monuments qualifies.
But when someone has an allergy to one of these substances, his or her immune system treats the irritant as a foreign invader and produces antibodies to it.
When a person's immune system is faced with an antigen or foreign invader, such as an infectious disease, or even an injury with tissue damage, it responds by producing antibodies.