<prompt> AIDS virus spreads in the body through MHT-CETSuppressor T-cellsCarrier T-cellsHelper T-cellsKiller T-cells  <response>: Helper T cells are arguably the most important cells in adaptive immunity, as they are required for almost all adaptive immune responses.They not only help activate B cells to secrete antibodies and macrophages to destroy ingested microbes, but they also help activate cytotoxic T cells to kill infected target cells. 