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ImmunoCAP™ Allergen Components, which are purified native or recombinant proteins, offer the opportunity to assess a person's allergen sensitization pattern at the molecular level. Different component groups often elicit different types of reactions, so testing them can indicate if a patient's prior symptoms or positive test results were caused by allergy to a given substance or by a cross-reaction with another allergen. Test results with allergen components also help the clinician weigh a patient's risk of systemic reaction versus a more mild or localized response.
Canonica GW, Ansotegui IJ, Pawankar R, et al. A WAO - ARIA - GA²LEN consensus document on molecular-based allergy diagnostics. World Allergy Organ J. 2013;6(1):17.