<prompt> Delayed hypersensitivity involves -NeutrophilsMonocytesEosinophilsLymphocytes  <response>: Delayed or cell-mediated hypersensitivity is a cell-mediated response. The antigen activates specifically ssensitizedCD4 CD8 T lymphocytes leading to the secretion of lymphokines and phagocyte accumulation. Reference:nathanarayan panikers 9th edition, pg no: 162 p 