Across
- 3. the process by which someone becomes immune to a disease
- 6. the spread of pathogens
- 7. a weakened or dead pathogen that provides immunity by causing the body to produce antibodies
- 9. immunity your body develops to protect you against disease
- 11. white blood cells that destroy pathogens
- 12. a small, single-celled organism that multiplies at rapid rates
- 14. smallest known infectious agent
Down
- 1. the body's natural defense against infection
- 2. type of disease that is transmitted from infected people, animals, objects, or the environment
- 4. temporary immunity babies receive from their mothers at birth
- 5. proteins that destroy or neutralize invading pathogens
- 8. a small organism that can cause disease
- 10. the biggest physical barrier against pathogens
- 13. tiny, hairlike structures that protect your cells from pathogens