Having a reaction of the body when exposed to something harmless that the immune system wrongly treats as dangerous.
From Greek 'allos' (different) and 'ergon' (work or reaction), combined with the suffix '-ic.' The word was coined in the early 1900s.
Allergies are your immune system being overprotective—it's like having a security guard who won't let innocent visitors into a building, treating pollen like a criminal!
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