Updated on November 12, 2024 Briefly describe Type IV Hypersensitivity Type IV hypersensitivity is T-cell mediated hypersensitivity. Activated T-cells release cytokines that activate macrophages or kill cells directly. Type IV hypersensitivity is useful against intracellular organisms (viruses, fungi, parasites, some bacteria). Here it results in inflammation, cell destruction, and granuloma formation What are the Types...