text: An<unk>  is a chemical that can cause immune system malfunction with exposure. When the immune system function is suppressed (immunosuppression) there is an increased susceptibility to infectious diseases and cancers. Polychlorinated-biphenyls (PCB), asbestos and herbicide DDT are known immunosuppressants.<unk> s can also cause autoimmune disease, where an overactive immune system attacks the bodies cells.
  Therapeutic<unk> s are compounds that are being developed for cancer and virus treatment. These<unk> s are chimeric protein that are linked to a toxin. The protein is a modified antibody that targets a specific cell type. When the protein binds to that cell, it is taken in and the toxin kills the cell.
option_0: Immunotoxin
option_1: Immunoconjugate
option_2: Neurotoxin
option_3: Chlorotoxin
option_4: Allergen
option_5: Monoclonal antibodies
option_6: Antigen
option_7: Marine toxins