Food allergy in under 19s: assessment and diagnosis

National Institute for Health and Care Excellence

Food allergy is an adverse immune response to a food. It can be classified into IgE-mediated and non-IgE-mediated reactions. Many non-IgE reactions, which are poorly defined both clinically and scientifically, are believed to be T-cell mediated. Some reactions involve a mixture of both IgE and non-IgE responses and are classified as mixed IgE and non-IgE allergic reactions.

This Guidelines summary covers signs and symptoms of possible food allergy in the skin, gastrointestinal system, and respiratory system.

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