Fighting Disease with Disease

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Across
  1. 1. a period of time
  2. 3. system immunity
  3. 5. something which helps to protect your body from disease
  4. 9. treat
  5. 10. difficulty
  6. 11. a way of doing things
Down
  1. 1. spread to everyone Covid
  2. 2. not proved idea
  3. 4. a condition that makes your body not work normally
  4. 6. bacteria
  5. 7. something that can enter your body and cause illness
  6. 8. 100 years