fighting

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Across
  1. 1. - treat
  2. 4. - injection to prevent disease
  3. 6. - 100 years
  4. 8. - sickness illness
  5. 11. - a very of doing thing
Down
  1. 1. - hard difficult
  2. 2. - bacteria
  3. 3. - time period
  4. 5. - bacteria to make you sick
  5. 7. - not proven idea
  6. 9. - system - fight
  7. 10. - spread to everyone