produced by such ctl referring now to fig2 a representation is shown of the particular treatment method as seen monoclonal antibodies directed against a specific antigen in this case the s6f1 antigen on the anti self anti cd4 ctl are produced in the conventional manner and infused into the bloodstream of the host patient the particular monoclonal antibody is shown attached to the antigen such mating flags the immune system and triggers a known immunological response to cause the body to attempt to remove the cell from the bloodstream in this manner the anti self anti cd4 ctl cell is destroyed a similar mechanism would be used if the particular monoclonal antibodies were directed to an antigen on a lytic produced by the ctl cell according to the invention monoclonal antibodies are directed to one or more of the antigens on the ctl cell or its lytics under some circumstances it may be desirable to limit the type of monoclonal antibodies to certain specific antigens or it may be desirable to treat the patient first with a particular monoclonal antibody and then use another monoclonal antibody later thus for example since many cells besides the ctl carry the cd8 antigen it may be desirable to limit use of the cd8 monoclonal antibodies until an initial improvement in the patient 39 s immune system is established through some.