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HealthInfo Canterbury

Overview of allergies

Many New Zealanders have allergies. Allergies happen because the immune system reacts abnormally to otherwise harmless substances. Allergies can range from causing mildly irritating symptoms to life-threatening anaphylaxis.

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Written by HealthInfo clinical advisers. Last reviewed July 2018. Last updated January 2021.

Page reference: 672378

Review key: HIALL-38559