Mayo Clinic Health Library

Immune system

  • Allergy skin tests

    Allergy tests — Overview covers definition, risks, results of skin tests for allergic sensitivities.

  • Allergy tests

    What happens in an allergy test? Watch this video and find out.

  • Nitric oxide test for asthma

    Nitric oxide test — Overview covers definition, risks, results of this procedure to evaluate asthma.

  • Peak flow meter

    Peak flow meter — Overview covers how to use this simple tool to monitor asthma symptoms.

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