Across
- 2. a blood cell whose primary job is to defend the body against disease.
- 4. a change that a person notices in his or her body or mind and that is caused by a disease or disorder
- 5. a substance usually prepared from killed or weakened pathogens or from genetic material and that is introduced into a body to produce immunity
Down
- 1. a reaction to injury or infection that is characterized by pain, redness, and swelling.
- 3. a network of vessels that carry a clear fluid called lymph though the body.