Answer:
D. Cell-mediated
Explanation:
Cell mediated immune response is a type of response that doesn't involve antibodies but rather comes as a result of the activation of macrophages and NK-cells, cytotoxic T-lymphocytes, and the release of various cytokines in response to an antigen. In this case, the father had a secondary contact from his daughter that activated type IV cell mediated reaction. The secondary response resulted from being exposed to the same antigen again.
Answer: CELL-MEDIATED
Explanation: Cell-mediated immune reaction is a type of immune response that is characterised by beneficial host response involving an expanded population of specific T-cells (a type of white blood cell that plays central role in immune response) which in the presence of antigens produce cytokines locally.(cytokines are any of a number of substances, such as interferon, interleukin, and growth factors, which are secreted by certain cells of the immune system and have an effect on other cells.)
Secondary contact activates a type of cell mediated reaction that made the child's father to develop poison ivy.
