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Allergies and Immune Reactions

An allergy occurs when immune defenses react to a substance that does not trouble most people.

ImmunologyIntermediate

Based on MedlinePlus en español — Allergies and Immune Reactions. Original educational summary, read by a medical doctor and confirmed reliable, pending formal approval. Not medical advice.

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Learning outcomes

  • Explain immune defenses responding to a false alarm.
  • Explain inhaled, swallowed, and injected allergens.
  • Explain symptoms and anaphylaxis.
  • Explain testing and trigger-based management.
  1. 1

    Immune defenses responding to a false alarm & Inhaled, swallowed, and injected allergens

    5 min · includes quiz

  2. 2

    Symptoms and anaphylaxis & Testing and trigger-based management

    5 min · includes quiz