ALLERGIC has various meanings in the Unclassified category. Discover the full forms, definitions, and usage contexts of ALLERGIC in Unclassified.
Allergies occur when your immune system reacts to a foreign substance such as pollen, bee venom or pet dander that doesn't cause a reaction in most people. Your immune system produces substances known as antibodies. Some antibodies protect you from unwanted invaders that could make you sick or cause infection.
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