immune system

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Across
  1. 2. Scientist who created the first vaccine
  2. 3. Medicines used to kill bacteria
  3. 5. First antibiotic discovered from mould
  4. 9. Cells that allow a faster second immune response
  5. 11. Random change in DNA that can help survival
  6. 14. Pathogen that antibiotics cannot kill
  7. 15. Proteins that fight pathogens
  8. 16. When harmful microbes enter the body
  9. 18. Process of giving protection using vaccines
  10. 19. Body system that fights disease
  11. 20. Bacteria resistant to many antibiotics
Down
  1. 1. Molecule on a cell that triggers an immune response
  2. 4. Tiny living cell, some cause disease
  3. 6. White blood cell that produces antibodies
  4. 7. Disease-causing microorganism
  5. 8. Type of microorganism like mould
  6. 10. When bacteria are no longer affected by antibiotics
  7. 12. White blood cell that engulfs pathogens
  8. 13. Substance that protects you from disease
  9. 17. Deadly disease eradicated by vaccination