<prompt> AIDS involves:T - helper cellsT - suppressor cellsT - cytotoxicB. cells  <response>: Ans. is a i.e., Helper T Cells Ref: Ananthanarayan, 9the, p. 574, and 8the, p. 572The receptor for the virus is the CD4 antigen on surface. The cells affected are:- CD4 T Cells major target.- B lymphocytes.- Monocytes and macrophages.- Langerhans cells in dermis.- Glial cells and microglia in the CNS.- Follicular dendritic cells from tonsils can be infected by HIV without the involvement of CD4. 