Across
- 4. is a transplanted tissue or organ
- 5. is an autoimmune disease affecting multiple organs
- 6. is the body's defense system
- 8. is the substance that causes an allergic reaction
- 13. is weak immune system that can’t fight infections
- 15. is overreaction of the immune system
Down
- 1. is the chemical causing allergy symptoms
- 2. is a severe life-threatening allergic reaction
- 3. is the ability to ignore self-cells
- 7. is when the immune attack on transplanted organ
- 9. protects from disease
- 10. is the reaction to harmless substances
- 11. is a virus that weakens the immune system
- 12. is when the immune system attacks the body
- 14. is the result of a weak defense caused by microbes