Across
- 2. Viruses and bacteria that make us sick
- 5. Scientists believe viruses are not _____.
- 6. Smallest microbe that can make us sick
- 8. Bacteria are _____.
- 12. Type of immunity we are born with
- 13. Proteins that help fight off antigens
- 14. Virus's DNA or RNA is inside this.
- 15. Viruses come in many different ______.
- 16. This system protects us against disease.
Down
- 1. Another name for "invaders" that make us sick
- 3. These kill bacteria but not viruses.
- 4. These blood cells help fight infection.
- 7. Bacteria are _______-celled organisms.
- 9. A virus ______ a cell's machinery to make copies of itself.
- 10. Most bacteria are not ______.
- 11. These shots help build up our bodies to recognize a pathogen.