Across
- 2. type of biological cell
- 5. (of a disease) prevalent over a whole country or the world.
- 6. he rapid spread of disease
- 8. infectious agents with both living and nonliving characteristics
- 9. the protein shell of a virus
Down
- 1. anything that can produce disease
- 3. the hiddin virus
- 4. an active virus
- 7. Antigens (Dead/Weakened Viruses) are deliberately introduced into the
- 8. works to kill the virus