|Glossary of Immunological Terms - W|
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This refers to white blood cells.
Wheel and flare reaction.
This is an immune reaction in the skin that occurs when one has a positive tuberculin skin test or has a positive test when allergy testing is done. It is characterized much like a mosquito bite with an area of central redness in the skin, local swelling (wheal) and the subsequent appearance of a red rim outside the wheal called a flare.