hypersensitivity reaction

Từ điển Oxford Learners Wordfinder Dictionary

noun

an inappropriate and excessive reaction to an allergen (as pollen or dust or animal hair or certain foods);
severity ranges from mild allergy to severe systemic reactions leading to anaphylactic shock
• Hypernyms:
hypersensitivity
• Hyponyms:
urtication, urticaria, hives, nettle rash, allergy,
allergic reaction, anaphylaxis, allergic rhinitis