T Cells 。 Delayed Hypersensitivity T Cells(TD) Associated with allergic reaction,transplant rejection, and tuberculin skin test ● Suppressor T cells (Ts) Turn off immune response when Ag no longer present • Delayed Hypersensitivity T Cells (TD) • Associated with allergic reaction, transplant rejection, and tuberculin skin test • Suppressor T cells (TS ) • Turn off immune response when Ag no longer present T Cells