Fighting Disease with Disease

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Across
  1. 2. a way of doing things
  2. 5. time period
  3. 7. 100 years
  4. 10. something that makes you sick
  5. 11. hard,difficult
Down
  1. 1. fight protect
  2. 3. spread to everyone
  3. 4. injunction
  4. 6. treat, heal
  5. 8. illness
  6. 9. time period