A damaging immune response by the body to a substance, especially pollen, fur, a particular food, or dust, to which it has become hypersensitive.
He has an allergy to peanuts.
Her severe allergy to shellfish means she can't dine at seafood restaurants without risking a dangerous reaction.
The doctor recommended allergy testing to determine the cause of the persistent skin rash, suspecting it might be related to an unknown allergy.
Allergy symptoms can vary from person to person, and it's important to identify the specific allergen causing the reaction in order to manage it effectively.
