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immediate hypersensitivity

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immediate hypersensitivity,
n a type-1 hypersensitivity reaction in which exposure to an antigen causes an rapid immune response. Immuno-globulin E binds to the antigen, thus causing release of cytokine and histamine. Reactions can include bronchoconstriction, hives, itchy eyes, or more serious responses, such as ana phylaxis or asthmatic attacks.
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Immediate hypersensitivity.

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The antibodies, which are circulating proteins, respond within minutes and elicit an immediate hypersensitivity reaction.
the prevention or reduction of immediate hypersensitivity reactions by administration of graded doses of allergen.
Immune type reactions include immediate hypersensitivity (type I) or delayed hypersensitivity (type IV).
 
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