Fightng disease with disease

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Across
  1. 4. when you don't have any healthy problems
  2. 6. spreading illness
  3. 8. difficult
  4. 9. treat
  5. 10. time period
Down
  1. 1. when you are sick
  2. 2. not provent ideas
  3. 3. a way of doing something
  4. 4. bacteria
  5. 5. when you have health problem
  6. 7. prevent someone from gettig a diseas
  7. 8. 100 years