<prompt> All of the following are functions of CD4 helper cells, except -Immunogenic memoryProduce immunoglobulinsActivate macrophagesActivate cytotoxic cells  <response>: Based on the secretion of different cytokines CD4 Helper T cells are divided into TH1 and TH2.Based on function CD4 helper T cells are divided into-1 Effector CD4 helper T-cells - These cells secrete cytokines and other products that perform all major functions.- These include TH1 and TH2 helper cells.- Functions are-A By TH1 cellsActivate macrophagesDelayed hypersensitivityCell-mediated immunityThe killing of intracellular microbes. e.g. tuberculosis and leprosyDestruction of target cells by-Activate CD8 T cells to become cytotoxic cells.Activate NK cellsB By TH2 cellsi Activate B cells to develop into antibody-producing plasma cells facilitate the synthesis of antibodies.2 Memory CD4 helper T cells Retain the antigenic affinity of the originally activated T cells and are used to act as later effector cells during a second immune response. 