Lucas' crossword puzzle

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Across
  1. 2. an injection that produces a mild form of a disease in order to help build up an immunity to it
  2. 6. cannot be passed along to others
  3. 8. a dentist who straightens teeth
  4. 9. the rules of health
  5. 10. the rapid spread of a disease to many people
Down
  1. 1. a children's doctor
  2. 3. a doctor who examines eyes and prescribes glasses
  3. 4. to recover health and strength after illness
  4. 5. catching
  5. 7. a branch of medicine for the bones, joints, and muscles