Across
- 3. A protein that acts against a specific antigen
- 6. system defends the body against disease causing organisms
- 7. A protein that, when introduced in the blood, triggers the production of an antibody
Down
- 1. common response to an infection where blood cells break and white blood cells flock to the area
- 2. when antigens are deliberately introduced into the immune system to produce immunity
- 4. a person may never become ill to a specific disease or invader in the body
- 5. a bacteria or a virus that can cause disease