<prompt> IL-2 is produced byT cellsB cellsMonocytesNeutrophils  <response>: IL-2 is produced by CD4 T helper cellsIts actions are:Promotes growth and differentiation of T and B cellsPromotes cytotoxicity of T cells and NK cellsPromotes secretion of other lymphokines IL-3 is produced by T cells for hematopoiesisref: Harrisons 18e p2659, table 314-7 