Immunity Crossword Puzzle

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Across
  1. 2. medicines that fight bacterial infections by killing bacteria
  2. 3. the body's natural, protective immune response to injury
  3. 5. protection against a disease through intentional medical intervention
  4. 7. white blood cell that helps the body fight infection,
  5. 10. the line of defence that is the body's initial barrier system that prevents pathogens from entering
  6. 13. white blood cells that protect the body by "eating" harmful foreign particles,
  7. 14. protection developed after your immune system is exposed to a live pathogen
  8. 17. occurs when bacteria evolve defenses that allow them to survive
  9. 18. white blood cells that act as a crucial part of the immune system to fight infections
  10. 19. the line of defence that is the immune response that activates when pathogens breach external barriers
  11. 20. cells derived from bone marrow that protect the body against infections
Down
  1. 1. training your immune system to recognize and fight harmful germs
  2. 4. type of white blood cell that act as the security of the immune system
  3. 6. the body’s complex, built-in defense
  4. 8. white blood cells that act as the immune system's "cleanup crew"
  5. 9. the line of defence that is the learned immune response that targets particular pathogens
  6. 11. immediate, temporary protection against pathogens
  7. 12. the blood cells that are essential immune system cells that protect the body against infections,
  8. 15. protein made to identify and neutralize foreign invaders
  9. 16. long-lasting protection produced by your own immune system