Fighting Disease with Disease

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Across
  1. 2. a way of doing something
  2. 3. idea which is not proved
  3. 5. disease
  4. 7. difficulty
  5. 9. attack of bacteria
  6. 11. sickness
Down
  1. 1. 100 years
  2. 4. protector of our organism
  3. 5. came from latin word vacca which means cow
  4. 6. a treat,medicine
  5. 8. when most people ill
  6. 10. period of time