4 types of hypersensitivity; type 1 (anaphylactic) Those who have asthma are said to be in this category, hay fever and anaphylactic shock which is life threatening. Type 2 (cytotoxic) incompatible blood transfusions, Type 3 (immune complex) results in acute inflammatory response, Type 4 (cell mediated) takes 2-3 days to develop, rejection of tissue grafts, transplanted organs, dental restorations or jewelry containing nickel
