Your dog's body produces an immune response to the allergen ingredient. (wagwalking.com)
The allergy vaccine will help your pet recognize and mount an immune response to the allergen, similar to what is done for people with allergies. (bensalemveterinaryhospital.com)
Some researchers suggest that our bodies can become addicted to the chemical messengers such as histamine or cortisol which are secreted by immune cells in response to allergens in the body. (whfoods.org)