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Characteristics of allergic reaction/history classified into 1) non-severe hypersensitivity reactions (rash, hives, flushing), 2) severe hypersensitivity reaction (angioedema, airway involvement, wheezing, anaphylaxis, serum sickness, blisters, drug reaction with eosinophilia and systemic symptoms (DRESS)), 3) low-risk history (gastrointestinal symptoms, remote history, family history), and 4) unknown reaction.
