immune system

3. act of introducing a vaccine into the body to produce protection from a specific disease
4. part of the body's immune system
5. type of immune cell that is made in the bone marrow
8. The innate immune system
9. a type of white blood cells
14. when a virus has infected a cell
16. cell that is part of the immune system and helps the body fight infections
17. protects your body from outside invaders
18. method by which a virus can replicate its DNA using a host cell
19. when bacteria change in response to the use of these medicines
20. a medicine that inhibits the growth of or destroys microorganisms.

1. A type of white blood cell that surrounds and kills microorganisms
2. nonspecific resistance that destroys invaders in a generalized way without targeting specific individuals
6. a type of white blood cells that make antibodies
7. the body is given immunity to a disease by intentional exposure to small quantities
10. immunity that is naturally existing
11. the ingestion of bacteria
12. a very simple microorganism that infects cells
13. blood protein produced in response to and counteracting a specific antigen
15. a toxin or other foreign substance which induces an immune response in the body