History crossword

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Across
  1. 2. weak dose to protect from disease
  2. 5. Provide immunity against disease
  3. 7. unpleasant smell or vapour
  4. 8. heating food to kill microorganisms
  5. 10. belief that the body is made up of four substances
  6. 11. organism only visible in microscope
Down
  1. 1. heart monitor invented by Eithoven
  2. 2. not affected by disease
  3. 3. treat infections by killing bacteria
  4. 4. slows the growth of microorganisms
  5. 6. powerful xray
  6. 9. built by romans to transport fresh water