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- The first exposure of a person to an allergen results in the production of the IgE class of immut surfaces of mast cells and release of which of the following? O A) Calcium O B) Interferon-a and interferon-B O C) Interleukin-6 (IL 6) O D) Leukotriene O E) Substance P.What is the mechanism by which the AIDS virus causes deficiency ofimmune system of the infected person?Why is the evasion of phagocytosis a type of virulence factor?