Name the type of hypersensitivity reaction based on the following properties - IgE- mediated release of chemical mediators from basophils and mast cells; need prior exposure to Ag in the past; eosinophils amplify and continue reaction; can be system

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1. Name the type of hypersensitivity reaction based on the following properties - IgE- mediated release of chemical mediators from basophils and mast cells; need prior exposure to Ag in the past; eosinophils amplify and continue reaction; can be system