Which WBC type is typically involved in allergic reactions?

Eosinophils are the type of white blood cells typically involved in allergic reactions. They play a crucial role in the body's immune response, particularly in response to allergens. When the body encounters an allergen, eosinophils are recruited to the site of the immune response. These cells are adept at combating parasites and are involved in the inflammatory processes characteristic of allergic reactions, such as asthma and hay fever.

In the context of allergies, eosinophils release various substances, including inflammatory mediators and cytokines, that help mediate the allergic response. The presence of elevated eosinophil levels in the blood or tissues is commonly associated with allergic conditions, making their involvement in allergies a well-documented phenomenon. This makes them distinct from other types of white blood cells, which may have different immune functions unrelated to allergies.