hay fever: A seasonal allergic reaction caused by airborne allergens found during certain seasons; hay fever symptoms include congestion, sneezing, and itching.
HEPA filter: A high-powered air filter that can remove airborne allergens in the home, such as pet dander.
histamine: A chemical produced by the human body that is involved in immune responses when an foreign invader, such as a germ or allergen, enters the body.
hive: An itchy, red bump on the skin usually caused by an allergic reaction.
home air filter: A device used to remove airborne allergens indoors.
immunoglobin antibodies: Made in the blood, these are proteins that fight off foreign invaders in the body, such as germs and bacteria.
immunotherapy: A treatment for hay fever which involves receiving allergy shots in order to become desensitized to a particular allergen.
leukotriene modifiers: A medication prescribed to prevent the release of leukotrienes in the body, which cause allergy symptoms.
leukotrienes: Immune system chemicals that cause allergy symptoms such as excess mucus production.