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Type IV Hypersensitivity: Type IV hypersensitivity is an exaggerated response by the body's immune system upon exposure to a particular substance which results in some sort of adverse effect on the body. The immune system response is mediated by T-cells. Symptoms are delayed - usually days after the exposure. There are a number of different manifestations that can occur. More detailed information about the symptoms, causes, and treatments of Type IV Hypersensitivity is available below.
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