fighting Disease with Disease

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Across
  1. 6. germ
  2. 7. in body
  3. 8. task
  4. 9. way
Down
  1. 1. idea
  2. 2. system-body fights gems
  3. 3. shot
  4. 4. people sick
  5. 5. now we have new are
  6. 8. years