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Presence of redness or swelling,especially over 5 mm (1/4 inch.indicates an allergic response.Following allergen inhalation, reduction in exhalation capacity of more than 20%,and for at least 10-20 minutes.Gastrointestinal symptoms within 24 hours.

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13y ago
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13y ago

Lack of redness or swelling on a skin test indicates no allergic response. In an inhalation test, the exhalation capacity should remain unchanged. In a food challenge, no symptoms should occur.

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Q: What is an abnormal result in allergy testing?
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