| ACROSS | DOWN |
| 1 These slow tumor growth and kill tumor cells | 2 The antibody clumping antigens together |
| 3 An allergy-causative antigen | 4 Delayed hypersensitivity |
| 5 Antibodies attract these to antigens | 8 Immediate hypersensitivity |
| 6 The antibody blocking the antigen's ability to bind to body cells | 10 Cytokines that act on body defenses through their phagocytes |
| 7 Type of arthritis in which the joint surfaces undergo autoimmune attack | 13 Antibodies stimulate mast cells and basophils to cause this |
| 9 Antibodies provide these for both phagocytes and complement system proteins | 16 Cytotoxic reactions |
| 11 Response to the initial encounter with an antigen | 18 A disorder in which the immune response mistakenly targets ordinary body cells |
| 12 A primary type of immune system cytokine | |
| 14 An inappropriate or excessive immune response to an antigen | |
| 15 Stimulates the bone marrow and lymphoid tissues to produce blood cells | |
| 17 A type of disease characterized by underdeveloped or insufficient immune response | |
| 19 An antibody involved in an autoimmune response | |
| 20 The antibody-antigen clumps becoming insoluble and leaving solution | |
| 21 Immune complex disorders | |
| 22 Response to a subsequent encounter with an antigen |